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

ash/wm/panels/panel_frame_view.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/wm/panels/panel_frame_view.h"
 
 #include "ash/common/frame/caption_buttons/frame_caption_button_container_view.h"
 #include "ash/common/frame/default_header_painter.h"
 #include "ash/common/frame/frame_border_hit_test.h"
 #include "ash/common/material_design/material_design_controller.h"
@@ skipping 23 matching lines @@
   WmShell::Get()->AddShellObserver(this);
 }
 
 PanelFrameView::~PanelFrameView() {
   WmShell::Get()->RemoveShellObserver(this);
 }
 
 void PanelFrameView::SetFrameColors(SkColor active_frame_color,
                                     SkColor inactive_frame_color) {
   header_painter_->SetFrameColors(active_frame_color, inactive_frame_color);
+  frame_->GetNativeWindow()->SetProperty(
+      aura::client::kTopViewColor, header_painter_->GetInactiveFrameColor());
 }
 
 const char* PanelFrameView::GetClassName() const {
   return kViewClassName;
 }
 
 void PanelFrameView::InitHeaderPainter() {
   header_painter_.reset(new DefaultHeaderPainter);
+  frame_->GetNativeWindow()->SetProperty(
+      aura::client::kTopViewColor, header_painter_->GetInactiveFrameColor());
 
   caption_button_container_ = new FrameCaptionButtonContainerView(frame_);
   AddChildView(caption_button_container_);
 
   header_painter_->Init(frame_, this, caption_button_container_);
 
   if (frame_->widget_delegate()->ShouldShowWindowIcon()) {
     window_icon_ = new views::ImageView();
     AddChildView(window_icon_);
     header_painter_->UpdateLeftHeaderView(window_icon_);
@@ skipping 86 matching lines @@
   if (ash::MaterialDesignController::IsOverviewMaterial())
     caption_button_container_->SetVisible(false);
 }
 
 void PanelFrameView::OnOverviewModeEnded() {
   if (ash::MaterialDesignController::IsOverviewMaterial())
     caption_button_container_->SetVisible(true);
 }
 
 }  // namespace ash