NOSUBMIT: Demonstrate accelerated layer painting problem in mus/mash

ui/views/bubble/tray_bubble_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 "ui/views/bubble/tray_bubble_view.h"
 
 #include <algorithm>
 
 #include "base/macros.h"
 #include "third_party/skia/include/core/SkCanvas.h"
@@ skipping 314 matching lines @@
       delegate_(delegate),
       preferred_width_(init_params.min_width),
       bubble_border_(new TrayBubbleBorder(this, GetAnchorView(), init_params)),
       owned_bubble_border_(bubble_border_),
       is_gesture_dragging_(false),
       mouse_actively_entered_(false) {
   set_parent_window(parent_window);
   set_notify_enter_exit_on_child(true);
   set_close_on_deactivate(init_params.close_on_deactivate);
   set_margins(gfx::Insets());
-  SetPaintToLayer(true);
-
-  bubble_content_mask_.reset(
-      new TrayBubbleContentMask(bubble_border_->GetBorderCornerRadius()));
+// JAMES: This and other statements below that turn on layers cause the tray
+// bubble not to paint.
+//  SetPaintToLayer(true);
+//
+//  bubble_content_mask_.reset(
+//      new TrayBubbleContentMask(bubble_border_->GetBorderCornerRadius()));
 }
 
 TrayBubbleView::~TrayBubbleView() {
   mouse_watcher_.reset();
   // Inform host items (models) that their views are being destroyed.
   if (delegate_)
     delegate_->BubbleViewDestroyed();
 }
 
 void TrayBubbleView::InitializeAndShowBubble() {
   // Must occur after call to BubbleDelegateView::CreateBubble().
   SetAlignment(params_.arrow_alignment);
   bubble_border_->UpdateArrowOffset();
 
-  layer()->parent()->SetMaskLayer(bubble_content_mask_->layer());
+  //JAMES
+  //layer()->parent()->SetMaskLayer(bubble_content_mask_->layer());
 
   GetWidget()->Show();
   GetWidget()->GetNativeWindow()->SetEventTargeter(
       scoped_ptr<ui::EventTargeter>(new BubbleWindowTargeter(this)));
   UpdateBubble();
 }
 
 void TrayBubbleView::UpdateBubble() {
   if (GetWidget()) {
     SizeToContents();
-    bubble_content_mask_->layer()->SetBounds(layer()->bounds());
+    //JAMES
+    //bubble_content_mask_->layer()->SetBounds(layer()->bounds());
     GetWidget()->GetRootView()->SchedulePaint();
   }
 }
 
 void TrayBubbleView::SetMaxHeight(int height) {
   params_.max_height = height;
   if (GetWidget())
     SizeToContents();
 }
 
@@ skipping 122 matching lines @@
   mouse_actively_entered_ = true;
   mouse_watcher_->Stop();
 }
 
 void TrayBubbleView::ChildPreferredSizeChanged(View* child) {
   SizeToContents();
 }
 
 void TrayBubbleView::ViewHierarchyChanged(
     const ViewHierarchyChangedDetails& details) {
-  if (details.is_add && details.child == this) {
-    details.parent->SetPaintToLayer(true);
-    details.parent->layer()->SetMasksToBounds(true);
-  }
+//JAMES
+//  if (details.is_add && details.child == this) {
+//    details.parent->SetPaintToLayer(true);
+//    details.parent->layer()->SetMasksToBounds(true);
+//  }
 }
 
 }  // namespace views