App list: Infrastructure now supports multiple custom launcher pages.

ui/app_list/app_list_view_delegate.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_VIEW_DELEGATE_H_
 #define UI_APP_LIST_APP_LIST_VIEW_DELEGATE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 122 matching lines @@
   virtual void ToggleSpeechRecognition() = 0;
 
   // Shows the app list for the profile specified by |profile_path|.
   virtual void ShowForProfileByPath(const base::FilePath& profile_path) = 0;
 
 #if defined(TOOLKIT_VIEWS)
   // Creates the web view for the start page. The caller takes the ownership of
   // the returned view.
   virtual views::View* CreateStartPageWebView(const gfx::Size& size) = 0;
 
-  // Creates the web view for the user-specified custom page. May return NULL.
-  // The caller takes ownership of the returned view.
-  virtual views::View* CreateCustomPageWebView(const gfx::Size& size) = 0;
+  // Creates the web views for the user-specified custom pages. The caller takes
+  // ownership of the returned views.
+  virtual std::vector<views::View*> CreateCustomPageWebViews(
+      const gfx::Size& size) = 0;
 #endif
 
   // Returns true if the delegate supports speech recognition.
   virtual bool IsSpeechRecognitionEnabled() = 0;
 
   // Returns the list of users (for AppListMenu).
   virtual const Users& GetUsers() const = 0;
 
   // Returns true if the app list should be centered and in landscape mode.
   virtual bool ShouldCenterWindow() const = 0;
 
   // Adds/removes an observer for profile changes.
   virtual void AddObserver(AppListViewDelegateObserver* observer) {}
   virtual void RemoveObserver(AppListViewDelegateObserver* observer) {}
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_APP_LIST_VIEW_DELEGATE_H_