Revert Aura changes

ash/launcher/app_launcher_button.cc

 // Copyright (c) 2012 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 "ash/launcher/app_launcher_button.h"
 
 #include <algorithm>
 
 #include "ash/launcher/launcher_button_host.h"
-#include "ui/base/accessibility/accessible_view_state.h"
 #include "ui/gfx/canvas_skia.h"
 
 namespace ash {
 
 namespace internal {
 
 const int kImageSize = 32;
 
 AppLauncherButton::AppLauncherButton(views::ButtonListener* listener,
                                      LauncherButtonHost* host)
@@ skipping 54 matching lines @@
   ImageButton::OnMouseDragged(event);
   host_->MouseDraggedOnButton(this, event);
   return true;
 }
 
 void AppLauncherButton::OnMouseExited(const views::MouseEvent& event) {
   ImageButton::OnMouseExited(event);
   host_->MouseExitedButton(this);
 }
 
-void AppLauncherButton::GetAccessibleState(ui::AccessibleViewState* state) {
-  state->role = ui::AccessibilityTypes::ROLE_PUSHBUTTON;
-  state->name = host_->GetAccessibleName(this);
-}
-
 }  // namespace internal
 }  // namespace ash