src/chrome/browser/web_applications/web_app_win.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/browser/web_applications/web_app_win.h"
   6
   7 #include <shlobj.h>
   8
   9 #include "base/command_line.h"
  10 #include "base/file_util.h"
  11 #include "base/files/file_enumerator.h"
  12 #include "base/logging.h"
  13 #include "base/md5.h"
  14 #include "base/path_service.h"
  15 #include "base/strings/string_piece.h"
  16 #include "base/strings/stringprintf.h"
  17 #include "base/strings/utf_string_conversions.h"
  18 #include "base/win/shortcut.h"
  19 #include "base/win/windows_version.h"
  20 #include "chrome/browser/web_applications/update_shortcut_worker_win.h"
  21 #include "chrome/common/chrome_switches.h"
  22 #include "chrome/installer/util/browser_distribution.h"
  23 #include "chrome/installer/util/shell_util.h"
  24 #include "chrome/installer/util/util_constants.h"
  25 #include "content/public/browser/browser_thread.h"
  26 #include "ui/base/win/shell.h"
  27 #include "ui/gfx/icon_util.h"
  28 #include "ui/gfx/image/image.h"
  29 #include "ui/gfx/image/image_family.h"
  30
  31 namespace {
  32
  33 const base::FilePath::CharType kIconChecksumFileExt[] =
  34     FILE_PATH_LITERAL(".ico.md5");
  35
  36 // Calculates checksum of an icon family using MD5.
  37 // The checksum is derived from all of the icons in the family.
  38 void GetImageCheckSum(const gfx::ImageFamily& image, base::MD5Digest* digest) {
  39   DCHECK(digest);
  40   base::MD5Context md5_context;
  41   base::MD5Init(&md5_context);
  42
  43   for (gfx::ImageFamily::const_iterator it = image.begin(); it != image.end();
  44        ++it) {
  45     SkBitmap bitmap = it->AsBitmap();
  46
  47     SkAutoLockPixels image_lock(bitmap);
  48     base::StringPiece image_data(
  49         reinterpret_cast<const char*>(bitmap.getPixels()), bitmap.getSize());
  50     base::MD5Update(&md5_context, image_data);
  51   }
  52
  53   base::MD5Final(digest, &md5_context);
  54 }
  55
  56 // Saves |image| as an |icon_file| with the checksum.
  57 bool SaveIconWithCheckSum(const base::FilePath& icon_file,
  58                           const gfx::ImageFamily& image) {
  59   if (!IconUtil::CreateIconFileFromImageFamily(image, icon_file))
  60     return false;
  61
  62   base::MD5Digest digest;
  63   GetImageCheckSum(image, &digest);
  64
  65   base::FilePath cheksum_file(icon_file.ReplaceExtension(kIconChecksumFileExt));
  66   return base::WriteFile(cheksum_file,
  67                          reinterpret_cast<const char*>(&digest),
  68                          sizeof(digest)) == sizeof(digest);
  69 }
  70
  71 // Returns true if |icon_file| is missing or different from |image|.
  72 bool ShouldUpdateIcon(const base::FilePath& icon_file,
  73                       const gfx::ImageFamily& image) {
  74   base::FilePath checksum_file(
  75       icon_file.ReplaceExtension(kIconChecksumFileExt));
  76
  77   // Returns true if icon_file or checksum file is missing.
  78   if (!base::PathExists(icon_file) ||
  79       !base::PathExists(checksum_file))
  80     return true;
  81
  82   base::MD5Digest persisted_image_checksum;
  83   if (sizeof(persisted_image_checksum) != base::ReadFile(checksum_file,
  84                       reinterpret_cast<char*>(&persisted_image_checksum),
  85                       sizeof(persisted_image_checksum)))
  86     return true;
  87
  88   base::MD5Digest downloaded_image_checksum;
  89   GetImageCheckSum(image, &downloaded_image_checksum);
  90
  91   // Update icon if checksums are not equal.
  92   return memcmp(&persisted_image_checksum, &downloaded_image_checksum,
  93                 sizeof(base::MD5Digest)) != 0;
  94 }
  95
  96 // Returns true if |shortcut_file_name| matches profile |profile_path|, and has
  97 // an --app-id flag.
  98 bool IsAppShortcutForProfile(const base::FilePath& shortcut_file_name,
  99                              const base::FilePath& profile_path) {
 100   base::string16 cmd_line_string;
 101   if (base::win::ResolveShortcut(shortcut_file_name, NULL, &cmd_line_string)) {
 102     cmd_line_string = L"program " + cmd_line_string;
 103     CommandLine shortcut_cmd_line = CommandLine::FromString(cmd_line_string);
 104     return shortcut_cmd_line.HasSwitch(switches::kProfileDirectory) &&
 105            shortcut_cmd_line.GetSwitchValuePath(switches::kProfileDirectory) ==
 106                profile_path.BaseName() &&
 107            shortcut_cmd_line.HasSwitch(switches::kAppId);
 108   }
 109
 110   return false;
 111 }
 112
 113 // Finds shortcuts in |shortcut_path| that match profile for |profile_path| and
 114 // extension with title |shortcut_name|.
 115 // If |shortcut_name| is empty, finds all shortcuts matching |profile_path|.
 116 std::vector<base::FilePath> FindAppShortcutsByProfileAndTitle(
 117     const base::FilePath& shortcut_path,
 118     const base::FilePath& profile_path,
 119     const base::string16& shortcut_name) {
 120   std::vector<base::FilePath> shortcut_paths;
 121
 122   if (shortcut_name.empty()) {
 123     // Find all shortcuts for this profile.
 124     base::FileEnumerator files(shortcut_path, false,
 125                                base::FileEnumerator::FILES,
 126                                FILE_PATH_LITERAL("*.lnk"));
 127     base::FilePath shortcut_file = files.Next();
 128     while (!shortcut_file.empty()) {
 129       if (IsAppShortcutForProfile(shortcut_file, profile_path))
 130         shortcut_paths.push_back(shortcut_file);
 131       shortcut_file = files.Next();
 132     }
 133   } else {
 134     // Find all shortcuts matching |shortcut_name|.
 135     base::FilePath base_path = shortcut_path.
 136         Append(web_app::internals::GetSanitizedFileName(shortcut_name)).
 137         AddExtension(FILE_PATH_LITERAL(".lnk"));
 138
 139     const int fileNamesToCheck = 10;
 140     for (int i = 0; i < fileNamesToCheck; ++i) {
 141       base::FilePath shortcut_file = base_path;
 142       if (i > 0) {
 143         shortcut_file = shortcut_file.InsertBeforeExtensionASCII(
 144             base::StringPrintf(" (%d)", i));
 145       }
 146       if (base::PathExists(shortcut_file) &&
 147           IsAppShortcutForProfile(shortcut_file, profile_path)) {
 148         shortcut_paths.push_back(shortcut_file);
 149       }
 150     }
 151   }
 152
 153   return shortcut_paths;
 154 }
 155
 156 // Creates application shortcuts in a given set of paths.
 157 // |shortcut_paths| is a list of directories in which shortcuts should be
 158 // created. If |creation_reason| is SHORTCUT_CREATION_AUTOMATED and there is an
 159 // existing shortcut to this app for this profile, does nothing (succeeding).
 160 // Returns true on success, false on failure.
 161 // Must be called on the FILE thread.
 162 bool CreateShortcutsInPaths(
 163     const base::FilePath& web_app_path,
 164     const web_app::ShortcutInfo& shortcut_info,
 165     const std::vector<base::FilePath>& shortcut_paths,
 166     web_app::ShortcutCreationReason creation_reason,
 167     std::vector<base::FilePath>* out_filenames) {
 168   // Ensure web_app_path exists.
 169   if (!base::PathExists(web_app_path) &&
 170       !base::CreateDirectory(web_app_path)) {
 171     return false;
 172   }
 173
 174   // Generates file name to use with persisted ico and shortcut file.
 175   base::FilePath icon_file =
 176       web_app::internals::GetIconFilePath(web_app_path, shortcut_info.title);
 177   if (!web_app::internals::CheckAndSaveIcon(icon_file, shortcut_info.favicon)) {
 178     return false;
 179   }
 180
 181   base::FilePath chrome_exe;
 182   if (!PathService::Get(base::FILE_EXE, &chrome_exe)) {
 183     NOTREACHED();
 184     return false;
 185   }
 186
 187   // Working directory.
 188   base::FilePath working_dir(chrome_exe.DirName());
 189
 190   CommandLine cmd_line(CommandLine::NO_PROGRAM);
 191   cmd_line = ShellIntegration::CommandLineArgsForLauncher(shortcut_info.url,
 192       shortcut_info.extension_id, shortcut_info.profile_path);
 193
 194   // TODO(evan): we rely on the fact that command_line_string() is
 195   // properly quoted for a Windows command line.  The method on
 196   // CommandLine should probably be renamed to better reflect that
 197   // fact.
 198   base::string16 wide_switches(cmd_line.GetCommandLineString());
 199
 200   // Sanitize description
 201   base::string16 description = shortcut_info.description;
 202   if (description.length() >= MAX_PATH)
 203     description.resize(MAX_PATH - 1);
 204
 205   // Generates app id from web app url and profile path.
 206   std::string app_name(web_app::GenerateApplicationNameFromInfo(shortcut_info));
 207   base::string16 app_id(ShellIntegration::GetAppModelIdForProfile(
 208       base::UTF8ToUTF16(app_name), shortcut_info.profile_path));
 209
 210   bool success = true;
 211   for (size_t i = 0; i < shortcut_paths.size(); ++i) {
 212     base::FilePath shortcut_file =
 213         shortcut_paths[i]
 214             .Append(
 215                  web_app::internals::GetSanitizedFileName(shortcut_info.title))
 216             .AddExtension(installer::kLnkExt);
 217     if (creation_reason == web_app::SHORTCUT_CREATION_AUTOMATED) {
 218       // Check whether there is an existing shortcut to this app.
 219       std::vector<base::FilePath> shortcut_files =
 220           FindAppShortcutsByProfileAndTitle(shortcut_paths[i],
 221                                             shortcut_info.profile_path,
 222                                             shortcut_info.title);
 223       if (!shortcut_files.empty())
 224         continue;
 225     }
 226     if (shortcut_paths[i] != web_app_path) {
 227       int unique_number =
 228           base::GetUniquePathNumber(shortcut_file,
 229                                     base::FilePath::StringType());
 230       if (unique_number == -1) {
 231         success = false;
 232         continue;
 233       } else if (unique_number > 0) {
 234         shortcut_file = shortcut_file.InsertBeforeExtensionASCII(
 235             base::StringPrintf(" (%d)", unique_number));
 236       }
 237     }
 238     base::win::ShortcutProperties shortcut_properties;
 239     shortcut_properties.set_target(chrome_exe);
 240     shortcut_properties.set_working_dir(working_dir);
 241     shortcut_properties.set_arguments(wide_switches);
 242     shortcut_properties.set_description(description);
 243     shortcut_properties.set_icon(icon_file, 0);
 244     shortcut_properties.set_app_id(app_id);
 245     shortcut_properties.set_dual_mode(false);
 246     if (!base::PathExists(shortcut_file.DirName()) &&
 247         !base::CreateDirectory(shortcut_file.DirName())) {
 248       NOTREACHED();
 249       return false;
 250     }
 251     success = base::win::CreateOrUpdateShortcutLink(
 252         shortcut_file, shortcut_properties,
 253         base::win::SHORTCUT_CREATE_ALWAYS) && success;
 254     if (out_filenames)
 255       out_filenames->push_back(shortcut_file);
 256   }
 257
 258   return success;
 259 }
 260
 261 // Gets the directories with shortcuts for an app, and deletes the shortcuts.
 262 // This will search the standard locations for shortcuts named |title| that open
 263 // in the profile with |profile_path|.
 264 // |was_pinned_to_taskbar| will be set to true if there was previously a
 265 // shortcut pinned to the taskbar for this app; false otherwise.
 266 // If |web_app_path| is empty, this will not delete shortcuts from the web app
 267 // directory. If |title| is empty, all shortcuts for this profile will be
 268 // deleted.
 269 // |shortcut_paths| will be populated with a list of directories where shortcuts
 270 // for this app were found (and deleted). This will delete duplicate shortcuts,
 271 // but only return each path once, even if it contained multiple deleted
 272 // shortcuts. Both of these may be NULL.
 273 void GetShortcutLocationsAndDeleteShortcuts(
 274     const base::FilePath& web_app_path,
 275     const base::FilePath& profile_path,
 276     const base::string16& title,
 277     bool* was_pinned_to_taskbar,
 278     std::vector<base::FilePath>* shortcut_paths) {
 279   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::FILE));
 280
 281   // Get all possible locations for shortcuts.
 282   web_app::ShortcutLocations all_shortcut_locations;
 283   all_shortcut_locations.in_quick_launch_bar = true;
 284   all_shortcut_locations.on_desktop = true;
 285   // Delete shortcuts from the Chrome Apps subdirectory.
 286   // This matches the subdir name set by CreateApplicationShortcutView::Accept
 287   // for Chrome apps (not URL apps, but this function does not apply for them).
 288   all_shortcut_locations.applications_menu_location =
 289       web_app::APP_MENU_LOCATION_SUBDIR_CHROMEAPPS;
 290   std::vector<base::FilePath> all_paths = web_app::internals::GetShortcutPaths(
 291       all_shortcut_locations);
 292   if (base::win::GetVersion() >= base::win::VERSION_WIN7 &&
 293       !web_app_path.empty()) {
 294     all_paths.push_back(web_app_path);
 295   }
 296
 297   if (was_pinned_to_taskbar) {
 298     // Determine if there is a link to this app in the TaskBar pin directory.
 299     base::FilePath taskbar_pin_path;
 300     if (PathService::Get(base::DIR_TASKBAR_PINS, &taskbar_pin_path)) {
 301       std::vector<base::FilePath> taskbar_pin_files =
 302           FindAppShortcutsByProfileAndTitle(taskbar_pin_path, profile_path,
 303                                             title);
 304       *was_pinned_to_taskbar = !taskbar_pin_files.empty();
 305     } else {
 306       *was_pinned_to_taskbar = false;
 307     }
 308   }
 309
 310   for (std::vector<base::FilePath>::const_iterator i = all_paths.begin();
 311        i != all_paths.end(); ++i) {
 312     std::vector<base::FilePath> shortcut_files =
 313         FindAppShortcutsByProfileAndTitle(*i, profile_path, title);
 314     if (shortcut_paths && !shortcut_files.empty()) {
 315       shortcut_paths->push_back(*i);
 316     }
 317     for (std::vector<base::FilePath>::const_iterator j = shortcut_files.begin();
 318          j != shortcut_files.end(); ++j) {
 319       // Any shortcut could have been pinned, either by chrome or the user, so
 320       // they are all unpinned.
 321       base::win::TaskbarUnpinShortcutLink(j->value().c_str());
 322       base::DeleteFile(*j, false);
 323     }
 324   }
 325 }
 326
 327 void CreateIconAndSetRelaunchDetails(const base::FilePath& web_app_path,
 328                                      const base::FilePath& icon_file,
 329                                      const web_app::ShortcutInfo& shortcut_info,
 330                                      HWND hwnd) {
 331   DCHECK(content::BrowserThread::GetBlockingPool()->RunsTasksOnCurrentThread());
 332
 333   CommandLine command_line =
 334       ShellIntegration::CommandLineArgsForLauncher(shortcut_info.url,
 335                                                    shortcut_info.extension_id,
 336                                                    shortcut_info.profile_path);
 337
 338   base::FilePath chrome_exe;
 339   if (!PathService::Get(base::FILE_EXE, &chrome_exe)) {
 340     NOTREACHED();
 341     return;
 342   }
 343   command_line.SetProgram(chrome_exe);
 344   ui::win::SetRelaunchDetailsForWindow(
 345       command_line.GetCommandLineString(), shortcut_info.title, hwnd);
 346
 347   if (!base::PathExists(web_app_path) && !base::CreateDirectory(web_app_path))
 348     return;
 349
 350   ui::win::SetAppIconForWindow(icon_file.value(), hwnd);
 351   web_app::internals::CheckAndSaveIcon(icon_file, shortcut_info.favicon);
 352 }
 353
 354 void OnShortcutInfoLoadedForSetRelaunchDetails(
 355     HWND hwnd,
 356     const web_app::ShortcutInfo& shortcut_info) {
 357   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
 358
 359   // Set window's icon to the one we're about to create/update in the web app
 360   // path. The icon cache will refresh on icon creation.
 361   base::FilePath web_app_path =
 362       web_app::GetWebAppDataDirectory(shortcut_info.profile_path,
 363                                       shortcut_info.extension_id,
 364                                       shortcut_info.url);
 365   base::FilePath icon_file =
 366       web_app_path.Append(web_app::internals::GetSanitizedFileName(
 367                               shortcut_info.title))
 368           .ReplaceExtension(FILE_PATH_LITERAL(".ico"));
 369
 370   content::BrowserThread::PostBlockingPoolTask(
 371       FROM_HERE,
 372       base::Bind(&CreateIconAndSetRelaunchDetails,
 373                  web_app_path,
 374                  icon_file,
 375                  shortcut_info,
 376                  hwnd));
 377 }
 378
 379 }  // namespace
 380
 381 namespace web_app {
 382
 383 base::FilePath CreateShortcutInWebAppDir(const base::FilePath& web_app_dir,
 384                                          const ShortcutInfo& shortcut_info) {
 385   std::vector<base::FilePath> paths;
 386   paths.push_back(web_app_dir);
 387   std::vector<base::FilePath> out_filenames;
 388   base::FilePath web_app_dir_shortcut =
 389       web_app_dir.Append(internals::GetSanitizedFileName(shortcut_info.title))
 390           .AddExtension(installer::kLnkExt);
 391   if (!PathExists(web_app_dir_shortcut)) {
 392     CreateShortcutsInPaths(web_app_dir,
 393                            shortcut_info,
 394                            paths,
 395                            SHORTCUT_CREATION_BY_USER,
 396                            &out_filenames);
 397     DCHECK_EQ(out_filenames.size(), 1u);
 398     DCHECK_EQ(out_filenames[0].value(), web_app_dir_shortcut.value());
 399   } else {
 400     internals::CheckAndSaveIcon(
 401         internals::GetIconFilePath(web_app_dir, shortcut_info.title),
 402         shortcut_info.favicon);
 403   }
 404   return web_app_dir_shortcut;
 405 }
 406
 407 void UpdateRelaunchDetailsForApp(Profile* profile,
 408                                  const extensions::Extension* extension,
 409                                  HWND hwnd) {
 410   web_app::GetShortcutInfoForApp(
 411       extension,
 412       profile,
 413       base::Bind(&OnShortcutInfoLoadedForSetRelaunchDetails, hwnd));
 414 }
 415
 416 void UpdateShortcutsForAllApps(Profile* profile,
 417                                const base::Closure& callback) {
 418   callback.Run();
 419 }
 420
 421 namespace internals {
 422
 423 // Saves |image| to |icon_file| if the file is outdated and refresh shell's
 424 // icon cache to ensure correct icon is displayed. Returns true if icon_file
 425 // is up to date or successfully updated.
 426 bool CheckAndSaveIcon(const base::FilePath& icon_file,
 427                       const gfx::ImageFamily& image) {
 428   if (ShouldUpdateIcon(icon_file, image)) {
 429     if (SaveIconWithCheckSum(icon_file, image)) {
 430       // Refresh shell's icon cache. This call is quite disruptive as user would
 431       // see explorer rebuilding the icon cache. It would be great that we find
 432       // a better way to achieve this.
 433       SHChangeNotify(SHCNE_ASSOCCHANGED, SHCNF_IDLIST | SHCNF_FLUSHNOWAIT,
 434                      NULL, NULL);
 435     } else {
 436       return false;
 437     }
 438   }
 439
 440   return true;
 441 }
 442
 443 bool CreatePlatformShortcuts(
 444     const base::FilePath& web_app_path,
 445     const ShortcutInfo& shortcut_info,
 446     const extensions::FileHandlersInfo& file_handlers_info,
 447     const ShortcutLocations& creation_locations,
 448     ShortcutCreationReason creation_reason) {
 449   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::FILE));
 450
 451   // Nothing to do on Windows for hidden apps.
 452   if (creation_locations.applications_menu_location == APP_MENU_LOCATION_HIDDEN)
 453     return true;
 454
 455   // Shortcut paths under which to create shortcuts.
 456   std::vector<base::FilePath> shortcut_paths =
 457       GetShortcutPaths(creation_locations);
 458
 459   bool pin_to_taskbar = creation_locations.in_quick_launch_bar &&
 460                         (base::win::GetVersion() >= base::win::VERSION_WIN7);
 461
 462   // Create/update the shortcut in the web app path for the "Pin To Taskbar"
 463   // option in Win7. We use the web app path shortcut because we will overwrite
 464   // it rather than appending unique numbers if the shortcut already exists.
 465   // This prevents pinned apps from having unique numbers in their names.
 466   if (pin_to_taskbar)
 467     shortcut_paths.push_back(web_app_path);
 468
 469   if (shortcut_paths.empty())
 470     return false;
 471
 472   if (!CreateShortcutsInPaths(web_app_path, shortcut_info, shortcut_paths,
 473                               creation_reason, NULL))
 474     return false;
 475
 476   if (pin_to_taskbar) {
 477     base::FilePath file_name = GetSanitizedFileName(shortcut_info.title);
 478     // Use the web app path shortcut for pinning to avoid having unique numbers
 479     // in the application name.
 480     base::FilePath shortcut_to_pin = web_app_path.Append(file_name).
 481         AddExtension(installer::kLnkExt);
 482     if (!base::win::TaskbarPinShortcutLink(shortcut_to_pin.value().c_str()))
 483       return false;
 484   }
 485
 486   return true;
 487 }
 488
 489 void UpdatePlatformShortcuts(
 490     const base::FilePath& web_app_path,
 491     const base::string16& old_app_title,
 492     const ShortcutInfo& shortcut_info,
 493     const extensions::FileHandlersInfo& file_handlers_info) {
 494   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::FILE));
 495
 496   // Generates file name to use with persisted ico and shortcut file.
 497   base::FilePath file_name =
 498       web_app::internals::GetSanitizedFileName(shortcut_info.title);
 499
 500   if (old_app_title != shortcut_info.title) {
 501     // The app's title has changed. Delete all existing app shortcuts and
 502     // recreate them in any locations they already existed (but do not add them
 503     // to locations where they do not currently exist).
 504     bool was_pinned_to_taskbar;
 505     std::vector<base::FilePath> shortcut_paths;
 506     GetShortcutLocationsAndDeleteShortcuts(
 507         web_app_path, shortcut_info.profile_path, old_app_title,
 508         &was_pinned_to_taskbar, &shortcut_paths);
 509     CreateShortcutsInPaths(web_app_path, shortcut_info, shortcut_paths,
 510                            SHORTCUT_CREATION_BY_USER, NULL);
 511     // If the shortcut was pinned to the taskbar,
 512     // GetShortcutLocationsAndDeleteShortcuts will have deleted it. In that
 513     // case, re-pin it.
 514     if (was_pinned_to_taskbar) {
 515       base::FilePath file_name = GetSanitizedFileName(shortcut_info.title);
 516       // Use the web app path shortcut for pinning to avoid having unique
 517       // numbers in the application name.
 518       base::FilePath shortcut_to_pin = web_app_path.Append(file_name).
 519           AddExtension(installer::kLnkExt);
 520       base::win::TaskbarPinShortcutLink(shortcut_to_pin.value().c_str());
 521     }
 522   }
 523
 524   // Update the icon if necessary.
 525   base::FilePath icon_file = GetIconFilePath(web_app_path, shortcut_info.title);
 526   CheckAndSaveIcon(icon_file, shortcut_info.favicon);
 527 }
 528
 529 void DeletePlatformShortcuts(const base::FilePath& web_app_path,
 530                              const ShortcutInfo& shortcut_info) {
 531   GetShortcutLocationsAndDeleteShortcuts(
 532       web_app_path, shortcut_info.profile_path, shortcut_info.title, NULL,
 533       NULL);
 534
 535   // If there are no more shortcuts in the Chrome Apps subdirectory, remove it.
 536   base::FilePath chrome_apps_dir;
 537   if (ShellUtil::GetShortcutPath(
 538           ShellUtil::SHORTCUT_LOCATION_START_MENU_CHROME_APPS_DIR,
 539           BrowserDistribution::GetDistribution(),
 540           ShellUtil::CURRENT_USER,
 541           &chrome_apps_dir)) {
 542     if (base::IsDirectoryEmpty(chrome_apps_dir))
 543       base::DeleteFile(chrome_apps_dir, false);
 544   }
 545 }
 546
 547 void DeleteAllShortcutsForProfile(const base::FilePath& profile_path) {
 548   GetShortcutLocationsAndDeleteShortcuts(base::FilePath(), profile_path, L"",
 549                                          NULL, NULL);
 550
 551   // If there are no more shortcuts in the Chrome Apps subdirectory, remove it.
 552   base::FilePath chrome_apps_dir;
 553   if (ShellUtil::GetShortcutPath(
 554           ShellUtil::SHORTCUT_LOCATION_START_MENU_CHROME_APPS_DIR,
 555           BrowserDistribution::GetDistribution(),
 556           ShellUtil::CURRENT_USER,
 557           &chrome_apps_dir)) {
 558     if (base::IsDirectoryEmpty(chrome_apps_dir))
 559       base::DeleteFile(chrome_apps_dir, false);
 560   }
 561 }
 562
 563 std::vector<base::FilePath> GetShortcutPaths(
 564     const ShortcutLocations& creation_locations) {
 565   // Shortcut paths under which to create shortcuts.
 566   std::vector<base::FilePath> shortcut_paths;
 567   // Locations to add to shortcut_paths.
 568   struct {
 569     bool use_this_location;
 570     ShellUtil::ShortcutLocation location_id;
 571   } locations[] = {
 572     {
 573       creation_locations.on_desktop,
 574       ShellUtil::SHORTCUT_LOCATION_DESKTOP
 575     }, {
 576       creation_locations.applications_menu_location ==
 577           APP_MENU_LOCATION_ROOT,
 578       ShellUtil::SHORTCUT_LOCATION_START_MENU_ROOT
 579     }, {
 580       creation_locations.applications_menu_location ==
 581           APP_MENU_LOCATION_SUBDIR_CHROME,
 582       ShellUtil::SHORTCUT_LOCATION_START_MENU_CHROME_DIR
 583     }, {
 584       creation_locations.applications_menu_location ==
 585           APP_MENU_LOCATION_SUBDIR_CHROMEAPPS,
 586       ShellUtil::SHORTCUT_LOCATION_START_MENU_CHROME_APPS_DIR
 587     }, {
 588       // For Win7+, |in_quick_launch_bar| indicates that we are pinning to
 589       // taskbar. This needs to be handled by callers.
 590       creation_locations.in_quick_launch_bar &&
 591           base::win::GetVersion() < base::win::VERSION_WIN7,
 592       ShellUtil::SHORTCUT_LOCATION_QUICK_LAUNCH
 593     }
 594   };
 595
 596   BrowserDistribution* dist = BrowserDistribution::GetDistribution();
 597   // Populate shortcut_paths.
 598   for (int i = 0; i < arraysize(locations); ++i) {
 599     if (locations[i].use_this_location) {
 600       base::FilePath path;
 601       if (!ShellUtil::GetShortcutPath(locations[i].location_id,
 602                                       dist,
 603                                       ShellUtil::CURRENT_USER,
 604                                       &path)) {
 605         NOTREACHED();
 606         continue;
 607       }
 608       shortcut_paths.push_back(path);
 609     }
 610   }
 611   return shortcut_paths;
 612 }
 613
 614 base::FilePath GetIconFilePath(const base::FilePath& web_app_path,
 615                                const base::string16& title) {
 616   return web_app_path.Append(GetSanitizedFileName(title))
 617       .AddExtension(FILE_PATH_LITERAL(".ico"));
 618 }
 619
 620 }  // namespace internals
 621
 622 void UpdateShortcutForTabContents(content::WebContents* web_contents) {
 623   // UpdateShortcutWorker will delete itself when it's done.
 624   UpdateShortcutWorker* worker = new UpdateShortcutWorker(web_contents);
 625   worker->Run();
 626 }
 627
 628 }  // namespace web_app