Support WebView in ash.

ash/shell/app_list.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 "ash/app_list/app_list_item_model.h"
 #include "ash/app_list/app_list_item_view.h"
 #include "ash/app_list/app_list_model.h"
 #include "ash/app_list/app_list_view.h"
 #include "ash/app_list/app_list_view_delegate.h"
 #include "ash/shell.h"
@@ skipping 74 matching lines @@
         Shell::GetInstance()->delegate()->LockScreen();
         break;
       }
       case WIDGETS_WINDOW: {
         CreateWidgetsWindow();
         break;
       }
       case EXAMPLES_WINDOW: {
 #if !defined(OS_MACOSX)
         views::examples::ShowExamplesWindow(
-            views::examples::DO_NOTHING_ON_CLOSE, NULL);
+            views::examples::DO_NOTHING_ON_CLOSE,
+            ash::Shell::GetInstance()->browser_context());
 #endif
         break;
       }
       default:
         break;
     }
   }
 
  private:
   Type type_;
@@ skipping 37 matching lines @@
 };
 
 }  // namespace
 
 ash::AppListViewDelegate* CreateAppListViewDelegate() {
   return new ExampleAppListViewDelegate;
 }
 
 }  // namespace shell
 }  // namespace ash