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

chrome/browser/ui/views/frame/browser_non_client_frame_view_ash.cc

Index: chrome/browser/ui/views/frame/browser_non_client_frame_view_ash.cc
diff --git a/chrome/browser/ui/views/frame/browser_non_client_frame_view_ash.cc b/chrome/browser/ui/views/frame/browser_non_client_frame_view_ash.cc
index 720ed9cd92be4d9b041f8465ecdb397fdef07dde..93db269b11b349bc29870b5db03c8c7b0be504aa 100644
--- a/chrome/browser/ui/views/frame/browser_non_client_frame_view_ash.cc
+++ b/chrome/browser/ui/views/frame/browser_non_client_frame_view_ash.cc
@@ -360,6 +360,8 @@ void BrowserNonClientFrameViewAsh::ChildPreferredSizeChanged(
 // ash::ShellObserver:
 
 void BrowserNonClientFrameViewAsh::OnOverviewModeStarting() {
+  frame()->GetNativeWindow()->SetProperty(aura::client::kTopViewColor,
+                                          GetFrameColor());
   if (ash::MaterialDesignController::IsOverviewMaterial())
     caption_button_container_->SetVisible(false);
 }