ash: First pass of Applist v2.

ash/app_list/app_list.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 ASH_APP_LIST_APP_LIST_H_
 #define ASH_APP_LIST_APP_LIST_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
@@ skipping 14 matching lines @@
 // While the UI is visible, it monitors things such as app list widget's
 // activation state and desktop mouse click to auto dismiss the UI.
 class AppList : public aura::EventFilter,
                 public aura::RootWindowObserver,
                 public ui::ImplicitAnimationObserver,
                 public views::Widget::Observer {
  public:
   AppList();
   virtual ~AppList();
 
+  // Returns true if AppListV2 is enabled.
+  static bool UseAppListV2();
+
   // Show/hide app list window.
   void SetVisible(bool visible);
 
   // Whether app list window is visible (shown or being shown).
   bool IsVisible();
 
   // Returns target visibility. This differs from IsVisible() if an animation
   // is ongoing.
   bool GetTargetVisibility() const { return is_visible_; }
 
@@ skipping 56 matching lines @@
   // animation is scheduled in ScheduleAnimation.
   base::OneShotTimer<AppList> second_animation_timer_;
 
   DISALLOW_COPY_AND_ASSIGN(AppList);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  //  ASH_APP_LIST_APP_LIST_H_