Move views::Accelerator to ui in order to use it from aura code.

views/bubble/bubble_delegate.h

 // Copyright (c) 2011 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 VIEWS_BUBBLE_BUBBLE_DELEGATE_H_
 #define VIEWS_BUBBLE_BUBBLE_DELEGATE_H_
 #pragma once
 
 #include "base/gtest_prod_util.h"
 #include "ui/base/animation/animation_delegate.h"
@@ skipping 70 matching lines @@
   // Fade the bubble in or out via Widget transparency.
   // Fade in calls Widget::Show; fade out calls Widget::Close upon completion.
   void StartFade(bool fade_in);
 
   // Reset fade and opacity of bubble. Restore the opacity of the
   // bubble to the setting before StartFade() was called.
   void ResetFade();
 
  protected:
   // View overrides:
-  virtual bool AcceleratorPressed(const Accelerator& accelerator) OVERRIDE;
+  virtual bool AcceleratorPressed(const ui::Accelerator& accelerator) OVERRIDE;
 
   // Perform view initialization on the contents for bubble sizing.
   virtual void Init();
 
  private:
   FRIEND_TEST_ALL_PREFIXES(BubbleFrameViewBasicTest, NonClientHitTest);
   FRIEND_TEST_ALL_PREFIXES(BubbleDelegateTest, CreateDelegate);
 
   // ui::AnimationDelegate overrides:
   virtual void AnimationEnded(const ui::Animation* animation);
@@ skipping 41 matching lines @@
   // Create a popup window for focusless bubbles on Linux/ChromeOS.
   // These bubbles are not interactive and should not gain focus.
   bool use_focusless_;
 
   DISALLOW_COPY_AND_ASSIGN(BubbleDelegateView);
 };
 
 }  // namespace views
 
 #endif  // VIEWS_BUBBLE_BUBBLE_DELEGATE_H_