Gallery.app: Add empty place holders for new separated Gallery app.

chrome/browser/extensions/component_loader.h

 // 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_COMPONENT_LOADER_H_
 #define CHROME_BROWSER_EXTENSIONS_COMPONENT_LOADER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 109 matching lines @@
   std::string Add(const base::DictionaryValue* parsed_manifest,
                   const base::FilePath& root_directory);
 
   // Loads a registered component extension.
   void Load(const ComponentExtensionInfo& info);
 
   void AddDefaultComponentExtensionsWithBackgroundPages(
       bool skip_session_components);
   void AddFileManagerExtension();
   void AddVideoPlayerExtension();
+  void AddGalleryExtension();
   void AddHangoutServicesExtension();
   void AddHotwordHelperExtension();
   void AddImageLoaderExtension();
   void AddNetworkSpeechSynthesisExtension();
 
   void AddWithName(int manifest_resource_id,
                    const base::FilePath& root_directory,
                    const std::string& name);
   void AddChromeApp();
   void AddKeyboardApp();
@@ skipping 17 matching lines @@
 
   FRIEND_TEST_ALL_PREFIXES(TtsApiTest, NetworkSpeechEngine);
   FRIEND_TEST_ALL_PREFIXES(TtsApiTest, NoNetworkSpeechEngineWhenOffline);
 
   DISALLOW_COPY_AND_ASSIGN(ComponentLoader);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_COMPONENT_LOADER_H_