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

views/view_unittest.cc

Index: views/view_unittest.cc
diff --git a/views/view_unittest.cc b/views/view_unittest.cc
index 03b7cfefa9433a8289cdc65a501e0f20fc1e5f1e..1d609e75fc13ca6b710dfbf704c3092239ee0c9e 100644
--- a/views/view_unittest.cc
+++ b/views/view_unittest.cc
@@ -215,7 +215,7 @@ class TestView : public View {
   virtual ui::TouchStatus OnTouchEvent(const TouchEvent& event) OVERRIDE;
   virtual void Paint(gfx::Canvas* canvas) OVERRIDE;
   virtual void SchedulePaintInRect(const gfx::Rect& rect) OVERRIDE;
-  virtual bool AcceleratorPressed(const Accelerator& accelerator) OVERRIDE;
+  virtual bool AcceleratorPressed(const ui::Accelerator& accelerator) OVERRIDE;
 
   // OnBoundsChanged.
   bool did_change_bounds_;
@@ -963,7 +963,7 @@ TEST_F(ViewTest, TextfieldCutCopyPaste) {
 ////////////////////////////////////////////////////////////////////////////////
 // Accelerators
 ////////////////////////////////////////////////////////////////////////////////
-bool TestView::AcceleratorPressed(const Accelerator& accelerator) {
+bool TestView::AcceleratorPressed(const ui::Accelerator& accelerator) {
   accelerator_count_map_[accelerator]++;
   return true;
 }