MacViews: Implement Full Keyboard Access.

ui/message_center/views/padded_button.cc

 // Copyright 2013 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 "ui/message_center/views/padded_button.h"
 
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/gfx/canvas.h"
 #include "ui/message_center/message_center_style.h"
 #include "ui/views/controls/button/image_button.h"
 #include "ui/views/painter.h"
 
 namespace message_center {
 
 PaddedButton::PaddedButton(views::ButtonListener* listener)
     : views::ImageButton(listener) {
-  SetFocusBehavior(FocusBehavior::ALWAYS);
+  Button::ConfigureDefaultFocus(this);
   set_request_focus_on_press(false);
   SetFocusPainter(views::Painter::CreateSolidFocusPainter(
       kFocusBorderColor,
       gfx::Insets(1, 2, 2, 2)));
 }
 
 PaddedButton::~PaddedButton() {
 }
 
 void PaddedButton::SetPadding(int horizontal_padding, int vertical_padding) {
@@ skipping 59 matching lines @@
 
   if (padding_.top() == 0 && padding_.bottom() == 0)
     offset.set_y((bounds.height() - image.height()) / 2);  // Middle align.
   else if (padding_.bottom() > 0)
     offset.set_y(bounds.height() - image.height());  // Bottom align.
 
   return bounds.origin() + offset;
 }
 
 }  // namespace message_center