Add keyboard navigation to the custom launcher page on app list start page.

ui/app_list/app_list_model.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 UI_APP_LIST_APP_LIST_MODEL_H_
 #define UI_APP_LIST_APP_LIST_MODEL_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 120 matching lines @@
   // Sets whether or not the folder UI should be enabled. If |folders_enabled|
   // is false, removes any non-OEM folders.
   void SetFoldersEnabled(bool folders_enabled);
 
   // Sets whether or not the custom launcher page should be enabled.
   void SetCustomLauncherPageEnabled(bool enabled);
   bool custom_launcher_page_enabled() const {
     return custom_launcher_page_enabled_;
   }
 
+  void set_custom_launcher_page_name(const std::string& name) {
+    custom_launcher_page_name_ = name;
+  }
+
+  const std::string& custom_launcher_page_name() const {
+    return custom_launcher_page_name_;
+  }
+
   // Pushes a custom launcher page's subpage into the state stack in the model.
   void PushCustomLauncherPageSubpage();
 
   // If the state stack is not empty, pops a subpage from the stack and returns
   // true. Returns false if the stack was empty.
   bool PopCustomLauncherPageSubpage();
 
   // Clears the custom launcher page's subpage state stack from the model.
   void ClearCustomLauncherPageSubpages();
 
@@ skipping 53 matching lines @@
   scoped_ptr<AppListItemList> top_level_item_list_;
 
   scoped_ptr<SearchBoxModel> search_box_;
   scoped_ptr<SearchResults> results_;
 
   Status status_;
   State state_;
   ObserverList<AppListModelObserver, true> observers_;
   bool folders_enabled_;
   bool custom_launcher_page_enabled_;
+  std::string custom_launcher_page_name_;
   bool search_engine_is_google_;
 
   // The current number of subpages the custom launcher page has pushed.
   int custom_launcher_page_subpage_depth_;
 
   DISALLOW_COPY_AND_ASSIGN(AppListModel);
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_APP_LIST_MODEL_H_