Add an experimental permissions API for extensions.

chrome/browser/background/background_mode_manager.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <string>
 
 #include "base/base_paths.h"
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/utf_string_conversions.h"
@@ skipping 178 matching lines @@
 }
 
 
 void BackgroundModeManager::RegisterProfile(Profile* profile) {
   // We don't want to register multiple times for one profile.
   DCHECK(background_mode_data_.find(profile) == background_mode_data_.end());
   BackgroundModeInfo bmd(new BackgroundModeData(current_command_id_++,
                                                 profile, this));
   background_mode_data_[profile] = bmd;
 
-  // Listen for when extensions are loaded/unloaded so we can track the
-  // number of background apps and modify our keep-alive and launch-on-startup
-  // state appropriately.
+  // Listen for when extensions are loaded/unloaded or add/remove the
+  // background permission so we can track the number of background apps and
+  // modify our keep-alive and launch-on-startup state appropriately.
   registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_LOADED,
                  Source<Profile>(profile));
   registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_UNLOADED,
                  Source<Profile>(profile));
+  registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_PERMISSIONS_UPDATED,
+                 Source<Profile>(profile));
 
   // Check for the presence of background apps after all extensions have been
   // loaded, to handle the case where an extension has been manually removed
   // while Chrome was not running.
   registrar_.Add(this, chrome::NOTIFICATION_EXTENSIONS_READY,
                  Source<Profile>(profile));
 
   bmd->applications_->AddObserver(this);
 
   // If we're adding a new profile and running in multi-profile mode, this new
@@ skipping 51 matching lines @@
         // If we already got an unload notification when it was disabled, ignore
         // this one.
         // TODO(atwilson): Change BackgroundModeManager to use
         // BackgroundApplicationListModel instead of tracking the count here.
         if (info->already_disabled)
           return;
         OnBackgroundAppUnloaded();
         OnBackgroundAppUninstalled();
       }
       break;
+    case chrome::NOTIFICATION_EXTENSION_PERMISSIONS_UPDATED: {
+        UpdatedExtensionPermissionsInfo* info =
+            Details<UpdatedExtensionPermissionsInfo>(details).ptr();
+        if (!info->permissions->HasAPIPermission(
+                ExtensionAPIPermission::kBackground))
+          break;
+
+        if (info->reason == UpdatedExtensionPermissionsInfo::ADDED) {
+          OnBackgroundAppInstalled(info->extension);
+          OnBackgroundAppLoaded();
+        } else {
+          OnBackgroundAppUnloaded();
+          OnBackgroundAppUninstalled();
+        }
+      }
+      break;
     case content::NOTIFICATION_APP_TERMINATING:
       // Make sure we aren't still keeping the app alive (only happens if we
       // don't receive an EXTENSIONS_READY notification for some reason).
       EndKeepAliveForStartup();
       // Performing an explicit shutdown, so exit background mode (does nothing
       // if we aren't in background mode currently).
       EndBackgroundMode();
       // Shutting down, so don't listen for any more notifications so we don't
       // try to re-enter/exit background mode again.
       registrar_.RemoveAll();
@@ skipping 303 matching lines @@
       command_line->HasSwitch(switches::kDisableExtensions);
   return background_mode_disabled;
 #endif
 }
 
 bool BackgroundModeManager::IsBackgroundModePrefEnabled() {
   PrefService* service = g_browser_process->local_state();
   DCHECK(service);
   return service->GetBoolean(prefs::kBackgroundModeEnabled);
 }