[ash-md] Fades overview header in and out

ash/wm/panels/panel_frame_view.cc

Index: ash/wm/panels/panel_frame_view.cc
diff --git a/ash/wm/panels/panel_frame_view.cc b/ash/wm/panels/panel_frame_view.cc
index f78fc6cdd7b818a4460f7ede4ad8ac23c23e071e..174220d84e91f837188e60d670e8ceea4e956f66 100644
--- a/ash/wm/panels/panel_frame_view.cc
+++ b/ash/wm/panels/panel_frame_view.cc
@@ -41,6 +41,9 @@ PanelFrameView::~PanelFrameView() {
 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,
+      static_cast<int>(header_painter_->GetInactiveFrameColor()));
 }
 
 const char* PanelFrameView::GetClassName() const {
@@ -49,6 +52,9 @@ const char* PanelFrameView::GetClassName() const {
 
 void PanelFrameView::InitHeaderPainter() {
   header_painter_.reset(new DefaultHeaderPainter);
+  frame_->GetNativeWindow()->SetProperty(
+      aura::client::kTopViewColor,
+      static_cast<int>(header_painter_->GetInactiveFrameColor()));
 
   caption_button_container_ = new FrameCaptionButtonContainerView(frame_);
   AddChildView(caption_button_container_);