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

chrome/browser/ui/views/frame/browser_view.h

Index: chrome/browser/ui/views/frame/browser_view.h
diff --git a/chrome/browser/ui/views/frame/browser_view.h b/chrome/browser/ui/views/frame/browser_view.h
index beae7bbfd40ac87736c74bb8171ae16c58e0bd16..86ebb060c14b28cd6df1ff19f401cf184bb40072 100644
--- a/chrome/browser/ui/views/frame/browser_view.h
+++ b/chrome/browser/ui/views/frame/browser_view.h
@@ -162,7 +162,7 @@ class BrowserView : public BrowserBubbleHost,
   virtual bool ShouldShowAvatar() const;
 
   // Handle the specified |accelerator| being pressed.
-  virtual bool AcceleratorPressed(const views::Accelerator& accelerator);
+  virtual bool AcceleratorPressed(const ui::Accelerator& accelerator);
 
   // Provides the containing frame with the accelerator for the specified
   // command id. This can be used to provide menu item shortcut hints etc.
@@ -551,7 +551,7 @@ class BrowserView : public BrowserBubbleHost,
   // Possibly records a user metrics action corresponding to the passed-in
   // accelerator.  Only implemented for Chrome OS, where we're interested in
   // learning about how frequently the top-row keys are used.
-  void UpdateAcceleratorMetrics(const views::Accelerator& accelerator,
+  void UpdateAcceleratorMetrics(const ui::Accelerator& accelerator,
                                 int command_id);
 
   // Invoked from ActiveTabChanged or when instant is made active.
@@ -669,7 +669,7 @@ class BrowserView : public BrowserBubbleHost,
   scoped_ptr<StatusBubbleViews> status_bubble_;
 
   // A mapping between accelerators and commands.
-  std::map<views::Accelerator, int> accelerator_table_;
+  std::map<ui::Accelerator, int> accelerator_table_;
 
   // True if we have already been initialized.
   bool initialized_;