src/chrome/browser/extensions/tab_helper.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/extensions/tab_helper.h"
   6
   7 #include "base/command_line.h"
   8 #include "base/logging.h"
   9 #include "base/strings/string_util.h"
  10 #include "base/strings/utf_string_conversions.h"
  11 #include "chrome/browser/chrome_notification_types.h"
  12 #include "chrome/browser/extensions/activity_log/activity_log.h"
  13 #include "chrome/browser/extensions/api/declarative/rules_registry_service.h"
  14 #include "chrome/browser/extensions/api/declarative_content/content_rules_registry.h"
  15 #include "chrome/browser/extensions/api/webstore/webstore_api.h"
  16 #include "chrome/browser/extensions/bookmark_app_helper.h"
  17 #include "chrome/browser/extensions/error_console/error_console.h"
  18 #include "chrome/browser/extensions/extension_action.h"
  19 #include "chrome/browser/extensions/extension_action_manager.h"
  20 #include "chrome/browser/extensions/extension_service.h"
  21 #include "chrome/browser/extensions/extension_tab_util.h"
  22 #include "chrome/browser/extensions/image_loader.h"
  23 #include "chrome/browser/extensions/page_action_controller.h"
  24 #include "chrome/browser/extensions/script_executor.h"
  25 #include "chrome/browser/extensions/webstore_inline_installer.h"
  26 #include "chrome/browser/extensions/webstore_inline_installer_factory.h"
  27 #include "chrome/browser/profiles/profile.h"
  28 #include "chrome/browser/sessions/session_id.h"
  29 #include "chrome/browser/sessions/session_tab_helper.h"
  30 #include "chrome/browser/shell_integration.h"
  31 #include "chrome/browser/ui/browser_commands.h"
  32 #include "chrome/browser/ui/browser_dialogs.h"
  33 #include "chrome/browser/ui/browser_finder.h"
  34 #include "chrome/browser/ui/browser_window.h"
  35 #include "chrome/browser/ui/host_desktop.h"
  36 #include "chrome/browser/web_applications/web_app.h"
  37 #include "chrome/common/chrome_switches.h"
  38 #include "chrome/common/extensions/chrome_extension_messages.h"
  39 #include "chrome/common/extensions/extension_constants.h"
  40 #include "chrome/common/extensions/manifest_handlers/app_launch_info.h"
  41 #include "chrome/common/render_messages.h"
  42 #include "chrome/common/url_constants.h"
  43 #include "content/public/browser/invalidate_type.h"
  44 #include "content/public/browser/navigation_controller.h"
  45 #include "content/public/browser/navigation_details.h"
  46 #include "content/public/browser/navigation_entry.h"
  47 #include "content/public/browser/notification_service.h"
  48 #include "content/public/browser/notification_source.h"
  49 #include "content/public/browser/notification_types.h"
  50 #include "content/public/browser/render_process_host.h"
  51 #include "content/public/browser/render_view_host.h"
  52 #include "content/public/browser/render_widget_host_view.h"
  53 #include "content/public/browser/web_contents.h"
  54 #include "content/public/common/frame_navigate_params.h"
  55 #include "extensions/browser/extension_error.h"
  56 #include "extensions/browser/extension_registry.h"
  57 #include "extensions/browser/extension_system.h"
  58 #include "extensions/common/extension.h"
  59 #include "extensions/common/extension_icon_set.h"
  60 #include "extensions/common/extension_messages.h"
  61 #include "extensions/common/extension_resource.h"
  62 #include "extensions/common/extension_urls.h"
  63 #include "extensions/common/feature_switch.h"
  64 #include "extensions/common/manifest_handlers/icons_handler.h"
  65
  66 #if defined(OS_CHROMEOS)
  67 #include "chrome/browser/ui/ash/launcher/chrome_launcher_controller.h"
  68 #endif
  69
  70 #if defined(OS_WIN)
  71 #include "chrome/browser/web_applications/web_app_win.h"
  72 #endif
  73
  74 using content::NavigationController;
  75 using content::NavigationEntry;
  76 using content::RenderViewHost;
  77 using content::WebContents;
  78
  79 DEFINE_WEB_CONTENTS_USER_DATA_KEY(extensions::TabHelper);
  80
  81 namespace extensions {
  82
  83 TabHelper::ScriptExecutionObserver::ScriptExecutionObserver(
  84     TabHelper* tab_helper)
  85     : tab_helper_(tab_helper) {
  86   tab_helper_->AddScriptExecutionObserver(this);
  87 }
  88
  89 TabHelper::ScriptExecutionObserver::ScriptExecutionObserver()
  90     : tab_helper_(NULL) {
  91 }
  92
  93 TabHelper::ScriptExecutionObserver::~ScriptExecutionObserver() {
  94   if (tab_helper_)
  95     tab_helper_->RemoveScriptExecutionObserver(this);
  96 }
  97
  98 TabHelper::TabHelper(content::WebContents* web_contents)
  99     : content::WebContentsObserver(web_contents),
 100       extension_app_(NULL),
 101       extension_function_dispatcher_(
 102           Profile::FromBrowserContext(web_contents->GetBrowserContext()), this),
 103       pending_web_app_action_(NONE),
 104       script_executor_(new ScriptExecutor(web_contents,
 105                                           &script_execution_observers_)),
 106       location_bar_controller_(new PageActionController(web_contents)),
 107       image_loader_ptr_factory_(this),
 108       webstore_inline_installer_factory_(new WebstoreInlineInstallerFactory()) {
 109   // The ActiveTabPermissionManager requires a session ID; ensure this
 110   // WebContents has one.
 111   SessionTabHelper::CreateForWebContents(web_contents);
 112   if (web_contents->GetRenderViewHost())
 113     SetTabId(web_contents->GetRenderViewHost());
 114   active_tab_permission_granter_.reset(new ActiveTabPermissionGranter(
 115       web_contents,
 116       SessionID::IdForTab(web_contents),
 117       Profile::FromBrowserContext(web_contents->GetBrowserContext())));
 118
 119   // If more classes need to listen to global content script activity, then
 120   // a separate routing class with an observer interface should be written.
 121   profile_ = Profile::FromBrowserContext(web_contents->GetBrowserContext());
 122
 123 #if defined(ENABLE_EXTENSIONS)
 124   AddScriptExecutionObserver(ActivityLog::GetInstance(profile_));
 125 #endif
 126
 127   registrar_.Add(this,
 128                  content::NOTIFICATION_LOAD_STOP,
 129                  content::Source<NavigationController>(
 130                      &web_contents->GetController()));
 131 }
 132
 133 TabHelper::~TabHelper() {
 134 #if defined(ENABLE_EXTENSIONS)
 135   RemoveScriptExecutionObserver(ActivityLog::GetInstance(profile_));
 136 #endif
 137 }
 138
 139 void TabHelper::CreateApplicationShortcuts() {
 140   DCHECK(CanCreateApplicationShortcuts());
 141   NavigationEntry* entry =
 142       web_contents()->GetController().GetLastCommittedEntry();
 143   if (!entry)
 144     return;
 145
 146   pending_web_app_action_ = CREATE_SHORTCUT;
 147
 148   // Start fetching web app info for CreateApplicationShortcut dialog and show
 149   // the dialog when the data is available in OnDidGetApplicationInfo.
 150   GetApplicationInfo(entry->GetPageID());
 151 }
 152
 153 void TabHelper::CreateHostedAppFromWebContents() {
 154   DCHECK(CanCreateBookmarkApp());
 155   NavigationEntry* entry =
 156       web_contents()->GetController().GetLastCommittedEntry();
 157   if (!entry)
 158     return;
 159
 160   pending_web_app_action_ = CREATE_HOSTED_APP;
 161
 162   // Start fetching web app info for CreateApplicationShortcut dialog and show
 163   // the dialog when the data is available in OnDidGetApplicationInfo.
 164   GetApplicationInfo(entry->GetPageID());
 165 }
 166
 167 bool TabHelper::CanCreateApplicationShortcuts() const {
 168 #if defined(OS_MACOSX)
 169   return false;
 170 #else
 171   return web_app::IsValidUrl(web_contents()->GetURL()) &&
 172       pending_web_app_action_ == NONE;
 173 #endif
 174 }
 175
 176 bool TabHelper::CanCreateBookmarkApp() const {
 177 #if defined(OS_MACOSX)
 178   return false;
 179 #else
 180   return IsValidBookmarkAppUrl(web_contents()->GetURL()) &&
 181          pending_web_app_action_ == NONE;
 182 #endif
 183 }
 184
 185 void TabHelper::SetExtensionApp(const Extension* extension) {
 186   DCHECK(!extension || AppLaunchInfo::GetFullLaunchURL(extension).is_valid());
 187   if (extension_app_ == extension)
 188     return;
 189
 190   extension_app_ = extension;
 191
 192   UpdateExtensionAppIcon(extension_app_);
 193
 194   content::NotificationService::current()->Notify(
 195       chrome::NOTIFICATION_TAB_CONTENTS_APPLICATION_EXTENSION_CHANGED,
 196       content::Source<TabHelper>(this),
 197       content::NotificationService::NoDetails());
 198 }
 199
 200 void TabHelper::SetExtensionAppById(const std::string& extension_app_id) {
 201   const Extension* extension = GetExtension(extension_app_id);
 202   if (extension)
 203     SetExtensionApp(extension);
 204 }
 205
 206 void TabHelper::SetExtensionAppIconById(const std::string& extension_app_id) {
 207   const Extension* extension = GetExtension(extension_app_id);
 208   if (extension)
 209     UpdateExtensionAppIcon(extension);
 210 }
 211
 212 SkBitmap* TabHelper::GetExtensionAppIcon() {
 213   if (extension_app_icon_.empty())
 214     return NULL;
 215
 216   return &extension_app_icon_;
 217 }
 218
 219 void TabHelper::FinishCreateBookmarkApp(
 220     const extensions::Extension* extension,
 221     const WebApplicationInfo& web_app_info) {
 222   pending_web_app_action_ = NONE;
 223
 224   // There was an error with downloading the icons or installing the app.
 225   if (!extension)
 226     return;
 227
 228 #if defined(OS_CHROMEOS)
 229   ChromeLauncherController::instance()->PinAppWithID(extension->id());
 230 #endif
 231
 232 // Android does not implement browser_finder.cc.
 233 #if !defined(OS_ANDROID)
 234   Browser* browser = chrome::FindBrowserWithWebContents(web_contents());
 235   if (browser) {
 236     browser->window()->ShowBookmarkAppBubble(web_app_info, extension->id());
 237   }
 238 #endif
 239 }
 240
 241 void TabHelper::RenderViewCreated(RenderViewHost* render_view_host) {
 242   SetTabId(render_view_host);
 243 }
 244
 245 void TabHelper::DidNavigateMainFrame(
 246     const content::LoadCommittedDetails& details,
 247     const content::FrameNavigateParams& params) {
 248 #if defined(ENABLE_EXTENSIONS)
 249   if (ExtensionSystem::Get(profile_)->extension_service() &&
 250       RulesRegistryService::Get(profile_)) {
 251     RulesRegistryService::Get(profile_)->content_rules_registry()->
 252         DidNavigateMainFrame(web_contents(), details, params);
 253   }
 254 #endif  // defined(ENABLE_EXTENSIONS)
 255
 256   content::BrowserContext* context = web_contents()->GetBrowserContext();
 257   ExtensionRegistry* registry = ExtensionRegistry::Get(context);
 258   const ExtensionSet& enabled_extensions = registry->enabled_extensions();
 259
 260   if (CommandLine::ForCurrentProcess()->HasSwitch(
 261           switches::kEnableStreamlinedHostedApps)) {
 262 #if !defined(OS_ANDROID)
 263     Browser* browser = chrome::FindBrowserWithWebContents(web_contents());
 264     if (browser && browser->is_app()) {
 265       SetExtensionApp(registry->GetExtensionById(
 266           web_app::GetExtensionIdFromApplicationName(browser->app_name()),
 267           ExtensionRegistry::EVERYTHING));
 268     } else {
 269       UpdateExtensionAppIcon(
 270           enabled_extensions.GetExtensionOrAppByURL(params.url));
 271     }
 272 #endif
 273   } else {
 274     UpdateExtensionAppIcon(
 275         enabled_extensions.GetExtensionOrAppByURL(params.url));
 276   }
 277
 278   if (details.is_in_page)
 279     return;
 280
 281   ExtensionActionManager* extension_action_manager =
 282       ExtensionActionManager::Get(Profile::FromBrowserContext(context));
 283   for (ExtensionSet::const_iterator it = enabled_extensions.begin();
 284        it != enabled_extensions.end();
 285        ++it) {
 286     ExtensionAction* browser_action =
 287         extension_action_manager->GetBrowserAction(*it->get());
 288     if (browser_action) {
 289       browser_action->ClearAllValuesForTab(SessionID::IdForTab(web_contents()));
 290       content::NotificationService::current()->Notify(
 291           chrome::NOTIFICATION_EXTENSION_BROWSER_ACTION_UPDATED,
 292           content::Source<ExtensionAction>(browser_action),
 293           content::NotificationService::NoDetails());
 294     }
 295   }
 296 }
 297
 298 bool TabHelper::OnMessageReceived(const IPC::Message& message) {
 299   bool handled = true;
 300   IPC_BEGIN_MESSAGE_MAP(TabHelper, message)
 301     IPC_MESSAGE_HANDLER(ChromeExtensionHostMsg_DidGetApplicationInfo,
 302                         OnDidGetApplicationInfo)
 303     IPC_MESSAGE_HANDLER(ExtensionHostMsg_InlineWebstoreInstall,
 304                         OnInlineWebstoreInstall)
 305     IPC_MESSAGE_HANDLER(ExtensionHostMsg_GetAppInstallState,
 306                         OnGetAppInstallState);
 307     IPC_MESSAGE_HANDLER(ExtensionHostMsg_Request, OnRequest)
 308     IPC_MESSAGE_HANDLER(ExtensionHostMsg_ContentScriptsExecuting,
 309                         OnContentScriptsExecuting)
 310     IPC_MESSAGE_HANDLER(ExtensionHostMsg_OnWatchedPageChange,
 311                         OnWatchedPageChange)
 312     IPC_MESSAGE_HANDLER(ChromeViewHostMsg_DetailedConsoleMessageAdded,
 313                         OnDetailedConsoleMessageAdded)
 314     IPC_MESSAGE_UNHANDLED(handled = false)
 315   IPC_END_MESSAGE_MAP()
 316   return handled;
 317 }
 318
 319 void TabHelper::DidCloneToNewWebContents(WebContents* old_web_contents,
 320                                          WebContents* new_web_contents) {
 321   // When the WebContents that this is attached to is cloned, give the new clone
 322   // a TabHelper and copy state over.
 323   CreateForWebContents(new_web_contents);
 324   TabHelper* new_helper = FromWebContents(new_web_contents);
 325
 326   new_helper->SetExtensionApp(extension_app());
 327   new_helper->extension_app_icon_ = extension_app_icon_;
 328 }
 329
 330 void TabHelper::OnDidGetApplicationInfo(int32 page_id,
 331                                         const WebApplicationInfo& info) {
 332   // Android does not implement BrowserWindow.
 333 #if !defined(OS_MACOSX) && !defined(OS_ANDROID)
 334   web_app_info_ = info;
 335
 336   NavigationEntry* entry =
 337       web_contents()->GetController().GetLastCommittedEntry();
 338   if (!entry || (entry->GetPageID() != page_id))
 339     return;
 340
 341   switch (pending_web_app_action_) {
 342     case CREATE_SHORTCUT: {
 343       chrome::ShowCreateWebAppShortcutsDialog(
 344           web_contents()->GetTopLevelNativeWindow(),
 345           web_contents());
 346       break;
 347     }
 348     case CREATE_HOSTED_APP: {
 349       if (web_app_info_.app_url.is_empty())
 350         web_app_info_.app_url = web_contents()->GetURL();
 351
 352       if (web_app_info_.title.empty())
 353         web_app_info_.title = web_contents()->GetTitle();
 354       if (web_app_info_.title.empty())
 355         web_app_info_.title = base::UTF8ToUTF16(web_app_info_.app_url.spec());
 356
 357       bookmark_app_helper_.reset(new BookmarkAppHelper(
 358           profile_->GetExtensionService(), web_app_info_, web_contents()));
 359       bookmark_app_helper_->Create(base::Bind(
 360           &TabHelper::FinishCreateBookmarkApp, base::Unretained(this)));
 361       break;
 362     }
 363     case UPDATE_SHORTCUT: {
 364       web_app::UpdateShortcutForTabContents(web_contents());
 365       break;
 366     }
 367     default:
 368       NOTREACHED();
 369       break;
 370   }
 371
 372   // The hosted app action will be cleared once the installation completes or
 373   // fails.
 374   if (pending_web_app_action_ != CREATE_HOSTED_APP)
 375     pending_web_app_action_ = NONE;
 376 #endif
 377 }
 378
 379 void TabHelper::OnInlineWebstoreInstall(int install_id,
 380                                         int return_route_id,
 381                                         const std::string& webstore_item_id,
 382                                         const GURL& requestor_url,
 383                                         int listeners_mask) {
 384 #if defined(ENABLE_EXTENSIONS)
 385   // Check that the listener is reasonable. We should never get anything other
 386   // than an install stage listener, a download listener, or both.
 387   if ((listeners_mask & ~(api::webstore::INSTALL_STAGE_LISTENER |
 388                           api::webstore::DOWNLOAD_PROGRESS_LISTENER)) != 0) {
 389     NOTREACHED();
 390     return;
 391   }
 392   // Inform the Webstore API that an inline install is happening, in case the
 393   // page requested status updates.
 394   Profile* profile =
 395       Profile::FromBrowserContext(web_contents()->GetBrowserContext());
 396   WebstoreAPI::Get(profile)->OnInlineInstallStart(
 397       return_route_id, this, webstore_item_id, listeners_mask);
 398 #endif
 399
 400   WebstoreStandaloneInstaller::Callback callback =
 401       base::Bind(&TabHelper::OnInlineInstallComplete, base::Unretained(this),
 402                  install_id, return_route_id);
 403   scoped_refptr<WebstoreInlineInstaller> installer(
 404       webstore_inline_installer_factory_->CreateInstaller(
 405           web_contents(),
 406           webstore_item_id,
 407           requestor_url,
 408           callback));
 409   installer->BeginInstall();
 410 }
 411
 412 void TabHelper::OnGetAppInstallState(const GURL& requestor_url,
 413                                      int return_route_id,
 414                                      int callback_id) {
 415   ExtensionRegistry* registry =
 416       ExtensionRegistry::Get(web_contents()->GetBrowserContext());
 417   const ExtensionSet& extensions = registry->enabled_extensions();
 418   const ExtensionSet& disabled_extensions = registry->disabled_extensions();
 419
 420   std::string state;
 421   if (extensions.GetHostedAppByURL(requestor_url))
 422     state = extension_misc::kAppStateInstalled;
 423   else if (disabled_extensions.GetHostedAppByURL(requestor_url))
 424     state = extension_misc::kAppStateDisabled;
 425   else
 426     state = extension_misc::kAppStateNotInstalled;
 427
 428   Send(new ExtensionMsg_GetAppInstallStateResponse(
 429       return_route_id, state, callback_id));
 430 }
 431
 432 void TabHelper::OnRequest(const ExtensionHostMsg_Request_Params& request) {
 433   extension_function_dispatcher_.Dispatch(request,
 434                                           web_contents()->GetRenderViewHost());
 435 }
 436
 437 void TabHelper::OnContentScriptsExecuting(
 438     const ScriptExecutionObserver::ExecutingScriptsMap& executing_scripts_map,
 439     int32 on_page_id,
 440     const GURL& on_url) {
 441   FOR_EACH_OBSERVER(ScriptExecutionObserver, script_execution_observers_,
 442                     OnScriptsExecuted(web_contents(),
 443                                       executing_scripts_map,
 444                                       on_page_id,
 445                                       on_url));
 446 }
 447
 448 void TabHelper::OnWatchedPageChange(
 449     const std::vector<std::string>& css_selectors) {
 450 #if defined(ENABLE_EXTENSIONS)
 451   if (ExtensionSystem::Get(profile_)->extension_service() &&
 452       RulesRegistryService::Get(profile_)) {
 453     RulesRegistryService::Get(profile_)->content_rules_registry()->Apply(
 454         web_contents(), css_selectors);
 455   }
 456 #endif  // defined(ENABLE_EXTENSIONS)
 457 }
 458
 459 void TabHelper::OnDetailedConsoleMessageAdded(
 460     const base::string16& message,
 461     const base::string16& source,
 462     const StackTrace& stack_trace,
 463     int32 severity_level) {
 464   if (IsSourceFromAnExtension(source)) {
 465     content::RenderViewHost* rvh = web_contents()->GetRenderViewHost();
 466     ErrorConsole::Get(profile_)->ReportError(
 467         scoped_ptr<ExtensionError>(new RuntimeError(
 468             extension_app_ ? extension_app_->id() : std::string(),
 469             profile_->IsOffTheRecord(),
 470             source,
 471             message,
 472             stack_trace,
 473             web_contents() ?
 474                 web_contents()->GetLastCommittedURL() : GURL::EmptyGURL(),
 475             static_cast<logging::LogSeverity>(severity_level),
 476             rvh->GetRoutingID(),
 477             rvh->GetProcess()->GetID())));
 478   }
 479 }
 480
 481 const Extension* TabHelper::GetExtension(const std::string& extension_app_id) {
 482   if (extension_app_id.empty())
 483     return NULL;
 484
 485   Profile* profile =
 486       Profile::FromBrowserContext(web_contents()->GetBrowserContext());
 487   ExtensionService* extension_service = profile->GetExtensionService();
 488   if (!extension_service || !extension_service->is_ready())
 489     return NULL;
 490
 491   const Extension* extension =
 492       extension_service->GetExtensionById(extension_app_id, false);
 493   return extension;
 494 }
 495
 496 void TabHelper::UpdateExtensionAppIcon(const Extension* extension) {
 497   extension_app_icon_.reset();
 498   // Ensure previously enqueued callbacks are ignored.
 499   image_loader_ptr_factory_.InvalidateWeakPtrs();
 500
 501   // Enqueue OnImageLoaded callback.
 502   if (extension) {
 503     Profile* profile =
 504         Profile::FromBrowserContext(web_contents()->GetBrowserContext());
 505     extensions::ImageLoader* loader = extensions::ImageLoader::Get(profile);
 506     loader->LoadImageAsync(
 507         extension,
 508         IconsInfo::GetIconResource(extension,
 509                                    extension_misc::EXTENSION_ICON_SMALL,
 510                                    ExtensionIconSet::MATCH_BIGGER),
 511         gfx::Size(extension_misc::EXTENSION_ICON_SMALL,
 512                   extension_misc::EXTENSION_ICON_SMALL),
 513         base::Bind(&TabHelper::OnImageLoaded,
 514                    image_loader_ptr_factory_.GetWeakPtr()));
 515   }
 516 }
 517
 518 void TabHelper::SetAppIcon(const SkBitmap& app_icon) {
 519   extension_app_icon_ = app_icon;
 520   web_contents()->NotifyNavigationStateChanged(content::INVALIDATE_TYPE_TITLE);
 521 }
 522
 523 void TabHelper::SetWebstoreInlineInstallerFactoryForTests(
 524     WebstoreInlineInstallerFactory* factory) {
 525   webstore_inline_installer_factory_.reset(factory);
 526 }
 527
 528 void TabHelper::OnImageLoaded(const gfx::Image& image) {
 529   if (!image.IsEmpty()) {
 530     extension_app_icon_ = *image.ToSkBitmap();
 531     web_contents()->NotifyNavigationStateChanged(content::INVALIDATE_TYPE_TAB);
 532   }
 533 }
 534
 535 WindowController* TabHelper::GetExtensionWindowController() const  {
 536   return ExtensionTabUtil::GetWindowControllerOfTab(web_contents());
 537 }
 538
 539 void TabHelper::OnInlineInstallComplete(int install_id,
 540                                         int return_route_id,
 541                                         bool success,
 542                                         const std::string& error) {
 543   Send(new ExtensionMsg_InlineWebstoreInstallResponse(
 544       return_route_id, install_id, success, success ? std::string() : error));
 545 }
 546
 547 WebContents* TabHelper::GetAssociatedWebContents() const {
 548   return web_contents();
 549 }
 550
 551 void TabHelper::GetApplicationInfo(int32 page_id) {
 552   Send(new ChromeExtensionMsg_GetApplicationInfo(routing_id(), page_id));
 553 }
 554
 555 void TabHelper::Observe(int type,
 556                         const content::NotificationSource& source,
 557                         const content::NotificationDetails& details) {
 558   switch (type) {
 559     case content::NOTIFICATION_LOAD_STOP: {
 560       const NavigationController& controller =
 561           *content::Source<NavigationController>(source).ptr();
 562       DCHECK_EQ(controller.GetWebContents(), web_contents());
 563
 564       if (pending_web_app_action_ == UPDATE_SHORTCUT) {
 565         // Schedule a shortcut update when web application info is available if
 566         // last committed entry is not NULL. Last committed entry could be NULL
 567         // when an interstitial page is injected (e.g. bad https certificate,
 568         // malware site etc). When this happens, we abort the shortcut update.
 569         NavigationEntry* entry = controller.GetLastCommittedEntry();
 570         if (entry)
 571           GetApplicationInfo(entry->GetPageID());
 572         else
 573           pending_web_app_action_ = NONE;
 574       }
 575       break;
 576     }
 577   }
 578 }
 579
 580 void TabHelper::SetTabId(RenderViewHost* render_view_host) {
 581   render_view_host->Send(
 582       new ExtensionMsg_SetTabId(render_view_host->GetRoutingID(),
 583                                 SessionID::IdForTab(web_contents())));
 584 }
 585
 586 }  // namespace extensions