NOSUBMIT: Demonstrate accelerated layer painting problem in mus/mash

ui/views/bubble/bubble_delegate.cc

Index: ui/views/bubble/bubble_delegate.cc
diff --git a/ui/views/bubble/bubble_delegate.cc b/ui/views/bubble/bubble_delegate.cc
index 5850c3f827ab6e9a79252b6a4f78f13d90ec13c2..86e3c6531ae95dd67a5179fe91b6dfcf36029d00 100644
--- a/ui/views/bubble/bubble_delegate.cc
+++ b/ui/views/bubble/bubble_delegate.cc
@@ -308,6 +308,9 @@ const gfx::FontList& BubbleDelegateView::GetTitleFontList() const {
 void BubbleDelegateView::UpdateColorsFromTheme(const ui::NativeTheme* theme) {
   if (!color_explicitly_set_)
     color_ = theme->GetSystemColor(ui::NativeTheme::kColorId_BubbleBackground);
+  // JAMES: When the individual views on top aren't drawing, this is more
+  // obvious than off-white.
+  color_ = SK_ColorRED;
   set_background(Background::CreateSolidBackground(color()));
   BubbleFrameView* frame_view = GetBubbleFrameView();
   if (frame_view)