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

views/controls/button/custom_button.cc

 // 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.
 
 #include "views/controls/button/custom_button.h"
 
 #include "ui/base/accessibility/accessible_view_state.h"
 #include "ui/base/animation/throb_animation.h"
 #include "ui/base/keycodes/keyboard_codes.h"
 #include "ui/gfx/screen.h"
@@ skipping 179 matching lines @@
 
 bool CustomButton::OnKeyReleased(const KeyEvent& event) {
   if ((state_ == BS_DISABLED) || (event.key_code() != ui::VKEY_SPACE))
     return false;
 
   SetState(BS_NORMAL);
   NotifyClick(event);
   return true;
 }
 
-bool CustomButton::AcceleratorPressed(const Accelerator& accelerator) {
+bool CustomButton::AcceleratorPressed(const ui::Accelerator& accelerator) {
   if (!View::IsEnabled())
     return false;
 
   SetState(BS_NORMAL);
   KeyEvent key_event(ui::ET_KEY_RELEASED, accelerator.key_code(),
                      accelerator.modifiers());
   NotifyClick(key_event);
   return true;
 }
 
@@ skipping 75 matching lines @@
 bool CustomButton::IsFocusable() const {
   return (state_ != BS_DISABLED) && View::IsFocusable();
 }
 
 void CustomButton::OnBlur() {
   if (IsHotTracked())
     SetState(BS_NORMAL);
 }
 
 }  // namespace views