Expose gallery watching functionality to the public mediaGalleries API.

chrome/browser/extensions/api/media_galleries_private/media_galleries_private_api.cc

 // Copyright (c) 2012 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 "chrome/browser/extensions/api/media_galleries_private/media_galleries_private_api.h"
 
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/files/file_path.h"
 #include "base/lazy_instance.h"
@@ skipping 31 matching lines @@
 
 const char kInvalidGalleryIDError[] = "Invalid gallery ID";
 
 // Handles the profile shutdown event on the file thread to clean up
 // GalleryWatchManager.
 void HandleProfileShutdownOnFileThread(void* profile_id) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::FILE);
   GalleryWatchManager::OnProfileShutdown(profile_id);
 }
 
-// Gets the |gallery_file_path| and |gallery_pref_id| of the gallery specified
-// by the |gallery_id|. Returns true and set |gallery_file_path| and
-// |gallery_pref_id| if the |gallery_id| is valid and returns false otherwise.
+// Returns true and sets |gallery_file_path| and |gallery_pref_id| if the
+// |gallery_id| is valid and returns false otherwise.
 bool GetGalleryFilePathAndId(const std::string& gallery_id,
                              Profile* profile,
                              const Extension* extension,
                              base::FilePath* gallery_file_path,
                              MediaGalleryPrefId* gallery_pref_id) {
   MediaGalleryPrefId pref_id;
   if (!base::StringToUint64(gallery_id, &pref_id))
     return false;
   MediaGalleriesPreferences* preferences =
       g_browser_process->media_file_system_registry()->GetPreferences(profile);
@@ skipping 286 matching lines @@
       g_browser_process->media_file_system_registry()->GetPreferences(
           GetProfile());
   GalleryWatchStateTracker* state_tracker = MediaGalleriesPrivateAPI::Get(
       GetProfile())->GetGalleryWatchStateTracker();
   state_tracker->RemoveAllGalleryWatchersForExtension(
       extension_id(), preferences);
   SendResponse(true);
 }
 
 }  // namespace extensions