Reland of [ash-md] Fades overview header in and out

ash/common/frame/default_header_painter.cc

 // Copyright 2014 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/common/frame/default_header_painter.h"
 
 #include "ash/common/ash_layout_constants.h"
 #include "ash/common/frame/caption_buttons/frame_caption_button_container_view.h"
 #include "ash/common/frame/header_painter_util.h"
 #include "base/debug/leak_annotations.h"
@@ skipping 188 matching lines @@
   view_->SchedulePaintInRect(GetTitleBounds());
 }
 
 void DefaultHeaderPainter::SetFrameColors(SkColor active_frame_color,
                                           SkColor inactive_frame_color) {
   active_frame_color_ = active_frame_color;
   inactive_frame_color_ = inactive_frame_color;
   UpdateAllButtonImages();
 }
 
+SkColor DefaultHeaderPainter::GetActiveFrameColor() const {
+  return active_frame_color_;
+}
+
+SkColor DefaultHeaderPainter::GetInactiveFrameColor() const {
+  return inactive_frame_color_;
+}
+
 void DefaultHeaderPainter::UpdateLeftHeaderView(views::View* left_header_view) {
   left_header_view_ = left_header_view;
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 // gfx::AnimationDelegate overrides:
 
 void DefaultHeaderPainter::AnimationProgressed(
     const gfx::Animation* animation) {
   view_->SchedulePaintInRect(GetLocalBounds());
@@ skipping 89 matching lines @@
   return HeaderPainterUtil::GetTitleBounds(
       left_header_view_, caption_button_container_, GetTitleFontList());
 }
 
 bool DefaultHeaderPainter::UsesCustomFrameColors() const {
   return active_frame_color_ != kDefaultFrameColor ||
          inactive_frame_color_ != kDefaultFrameColor;
 }
 
 }  // namespace ash