Warm-up the App List when enabled from the webstore and not shown.

chrome/browser/ui/app_list/app_list_service.h

 // Copyright 2013 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_UI_APP_LIST_APP_LIST_SERVICE_H_
 #define CHROME_BROWSER_UI_APP_LIST_APP_LIST_SERVICE_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 30 matching lines @@
   virtual void HandleFirstRun() = 0;
 
   virtual base::FilePath GetProfilePath(
       const base::FilePath& user_data_dir) = 0;
   virtual void SetProfilePath(const base::FilePath& profile_path) = 0;
 
   // Show the app list for the profile configured in the user data dir for the
   // current browser process.
   virtual void Show() = 0;
 
+  // Create the app list UI, and maintain its state, but do not show it.
+  virtual void CreateForProfile(Profile* requested_profile) = 0;
+
   // Show the app list for the given profile. If it differs from the profile the
   // app list is currently showing, repopulate the app list and save the new
   // profile to local prefs as the default app list profile.
   virtual void ShowForProfile(Profile* requested_profile) = 0;
 
   // Dismiss the app list.
   virtual void DismissAppList() = 0;
 
   // Get the profile the app list is currently showing.
   virtual Profile* GetCurrentAppListProfile() = 0;
@@ skipping 16 matching lines @@
   virtual ~AppListService() {}
 
   // Do any once off initialization needed for the app list.
   virtual void Init(Profile* initial_profile) = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(AppListService);
 };
 
 #endif  // CHROME_BROWSER_UI_APP_LIST_APP_LIST_SERVICE_H_