src/chrome/browser/extensions/chrome_process_manager_delegate.cc

   1 // Copyright 2014 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/chrome_process_manager_delegate.h"
   6
   7 #include "base/command_line.h"
   8 #include "base/logging.h"
   9 #include "chrome/browser/browser_process.h"
  10 #include "chrome/browser/chrome_notification_types.h"
  11 #include "chrome/browser/profiles/profile.h"
  12 #include "chrome/browser/profiles/profile_manager.h"
  13 #include "chrome/browser/ui/browser.h"
  14 #include "chrome/browser/ui/browser_finder.h"
  15 #include "chrome/common/chrome_switches.h"
  16 #include "content/public/browser/notification_service.h"
  17 #include "extensions/browser/extension_system.h"
  18 #include "extensions/browser/process_manager.h"
  19 #include "extensions/browser/process_manager_factory.h"
  20 #include "extensions/common/one_shot_event.h"
  21
  22 namespace extensions {
  23
  24 ChromeProcessManagerDelegate::ChromeProcessManagerDelegate() {
  25   registrar_.Add(this,
  26                  chrome::NOTIFICATION_BROWSER_WINDOW_READY,
  27                  content::NotificationService::AllSources());
  28   registrar_.Add(this,
  29                  chrome::NOTIFICATION_PROFILE_CREATED,
  30                  content::NotificationService::AllSources());
  31   registrar_.Add(this,
  32                  chrome::NOTIFICATION_PROFILE_DESTROYED,
  33                  content::NotificationService::AllSources());
  34 }
  35
  36 ChromeProcessManagerDelegate::~ChromeProcessManagerDelegate() {
  37 }
  38
  39 bool ChromeProcessManagerDelegate::IsBackgroundPageAllowed(
  40     content::BrowserContext* context) const {
  41   Profile* profile = static_cast<Profile*>(context);
  42
  43   // Disallow if the current session is a Guest mode session but the current
  44   // browser context is *not* off-the-record. Such context is artificial and
  45   // background page shouldn't be created in it.
  46   // http://crbug.com/329498
  47   return !(profile->IsGuestSession() && !profile->IsOffTheRecord());
  48 }
  49
  50 bool ChromeProcessManagerDelegate::DeferCreatingStartupBackgroundHosts(
  51     content::BrowserContext* context) const {
  52   Profile* profile = static_cast<Profile*>(context);
  53
  54   // The profile may not be valid yet if it is still being initialized.
  55   // In that case, defer loading, since it depends on an initialized profile.
  56   // Background hosts will be loaded later via NOTIFICATION_PROFILE_CREATED.
  57   // http://crbug.com/222473
  58   if (!g_browser_process->profile_manager()->IsValidProfile(profile))
  59     return true;
  60
  61   // There are no browser windows open and the browser process was
  62   // started to show the app launcher. Background hosts will be loaded later
  63   // via NOTIFICATION_BROWSER_WINDOW_READY. http://crbug.com/178260
  64   return chrome::GetTotalBrowserCountForProfile(profile) == 0 &&
  65          CommandLine::ForCurrentProcess()->HasSwitch(switches::kShowAppList);
  66 }
  67
  68 void ChromeProcessManagerDelegate::Observe(
  69     int type,
  70     const content::NotificationSource& source,
  71     const content::NotificationDetails& details) {
  72   switch (type) {
  73     case chrome::NOTIFICATION_BROWSER_WINDOW_READY: {
  74       Browser* browser = content::Source<Browser>(source).ptr();
  75       OnBrowserWindowReady(browser);
  76       break;
  77     }
  78     case chrome::NOTIFICATION_PROFILE_CREATED: {
  79       Profile* profile = content::Source<Profile>(source).ptr();
  80       OnProfileCreated(profile);
  81       break;
  82     }
  83     case chrome::NOTIFICATION_PROFILE_DESTROYED: {
  84       Profile* profile = content::Source<Profile>(source).ptr();
  85       OnProfileDestroyed(profile);
  86       break;
  87     }
  88     default:
  89       NOTREACHED();
  90   }
  91 }
  92
  93 void ChromeProcessManagerDelegate::OnBrowserWindowReady(Browser* browser) {
  94   Profile* profile = browser->profile();
  95   DCHECK(profile);
  96
  97   // If the extension system isn't ready yet the background hosts will be
  98   // created automatically when it is.
  99   ExtensionSystem* system = ExtensionSystem::Get(profile);
 100   if (!system->ready().is_signaled())
 101     return;
 102
 103   // Inform the process manager for this profile that the window is ready.
 104   // We continue to observe the notification in case browser windows open for
 105   // a related incognito profile or other regular profiles.
 106   ProcessManager* manager = ProcessManager::Get(profile);
 107   DCHECK(manager);
 108   DCHECK_EQ(profile, manager->GetBrowserContext());
 109   manager->MaybeCreateStartupBackgroundHosts();
 110
 111   // For incognito profiles also inform the original profile's process manager
 112   // that the window is ready. This will usually be a no-op because the
 113   // original profile's process manager should have been informed when the
 114   // non-incognito window opened.
 115   if (profile->IsOffTheRecord()) {
 116     Profile* original_profile = profile->GetOriginalProfile();
 117     ProcessManager* original_manager = ProcessManager::Get(original_profile);
 118     DCHECK(original_manager);
 119     DCHECK_EQ(original_profile, original_manager->GetBrowserContext());
 120     original_manager->MaybeCreateStartupBackgroundHosts();
 121   }
 122 }
 123
 124 void ChromeProcessManagerDelegate::OnProfileCreated(Profile* profile) {
 125   // Incognito profiles are handled by their original profile.
 126   if (profile->IsOffTheRecord())
 127     return;
 128
 129   // The profile can be created before the extension system is ready.
 130   if (!ExtensionSystem::Get(profile)->ready().is_signaled())
 131     return;
 132
 133   // The profile might have been initialized asynchronously (in parallel with
 134   // extension system startup). Now that initialization is complete the
 135   // ProcessManager can load deferred background pages.
 136   ProcessManager::Get(profile)->MaybeCreateStartupBackgroundHosts();
 137 }
 138
 139 void ChromeProcessManagerDelegate::OnProfileDestroyed(Profile* profile) {
 140   // Close background hosts when the last profile is closed so that they
 141   // have time to shutdown various objects on different threads. The
 142   // ProfileManager destructor is called too late in the shutdown sequence.
 143   // http://crbug.com/15708
 144   ProcessManager* manager =
 145       ProcessManagerFactory::GetForBrowserContextIfExists(profile);
 146   if (manager) {
 147     manager->CloseBackgroundHosts();
 148   }
 149
 150   // If this profile owns an incognito profile, but it is destroyed before the
 151   // incognito profile is destroyed, then close the incognito background hosts
 152   // as well. This happens in a few tests. http://crbug.com/138843
 153   if (!profile->IsOffTheRecord() && profile->HasOffTheRecordProfile()) {
 154     ProcessManager* incognito_manager =
 155         ProcessManagerFactory::GetForBrowserContextIfExists(
 156             profile->GetOffTheRecordProfile());
 157     if (incognito_manager) {
 158       incognito_manager->CloseBackgroundHosts();
 159     }
 160   }
 161 }
 162
 163 }  // namespace extensions