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

chrome/browser/ui/views/bubble/bubble.h

Index: chrome/browser/ui/views/bubble/bubble.h
diff --git a/chrome/browser/ui/views/bubble/bubble.h b/chrome/browser/ui/views/bubble/bubble.h
index b6093d1eb30128e1c1047c25f27cce4846d07d52..91586a431e47b831e2a5c319b374d1a2a576d1a8 100644
--- a/chrome/browser/ui/views/bubble/bubble.h
+++ b/chrome/browser/ui/views/bubble/bubble.h
@@ -87,7 +87,7 @@ class Bubble
 #elif defined(TOOLKIT_USES_GTK)
     : public views::NativeWidgetGtk,
 #endif
-      public views::AcceleratorTarget,
+      public ui::AcceleratorTarget,
       public ui::AnimationDelegate {
  public:
   class Observer {
@@ -236,7 +236,7 @@ class Bubble
   void UnregisterEscapeAccelerator();
 
   // Overridden from AcceleratorTarget:
-  virtual bool AcceleratorPressed(const views::Accelerator& accelerator);
+  virtual bool AcceleratorPressed(const ui::Accelerator& accelerator);
 
   // The delegate, if any.
   BubbleDelegate* delegate_;