NOSUBMIT: Demonstrate accelerated layer painting problem in mus/mash

ash/system/date/date_default_view.cc

 // Copyright 2014 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/system/date/date_default_view.h"
 
 #include "ash/metrics/user_metrics_recorder.h"
 #include "ash/session/session_state_delegate.h"
 #include "ash/shell.h"
 #include "ash/system/date/date_view.h"
@@ skipping 108 matching lines @@
 }
 
 tray::DateView* DateDefaultView::GetDateView() {
   return date_view_;
 }
 
 const tray::DateView* DateDefaultView::GetDateView() const {
   return date_view_;
 }
 
+void DateDefaultView::OnPaint(gfx::Canvas* canvas) {
+  // JAMES: This is triggered by hovering the mouse over the lower-left corner
+  // of the bubble.
+  LOG(ERROR) << "JAMES OnPaint";
+  views::View::OnPaint(canvas);
+}
+
 void DateDefaultView::ButtonPressed(views::Button* sender,
                                     const ui::Event& event) {
   ash::Shell* shell = ash::Shell::GetInstance();
   ash::SystemTrayDelegate* tray_delegate = shell->system_tray_delegate();
   if (sender == help_button_) {
     shell->metrics()->RecordUserMetricsAction(ash::UMA_TRAY_HELP);
     tray_delegate->ShowHelp();
   } else if (sender == shutdown_button_) {
     shell->metrics()->RecordUserMetricsAction(ash::UMA_TRAY_SHUT_DOWN);
     ash::Shell::GetInstance()->lock_state_controller()->RequestShutdown();
   } else if (sender == lock_button_) {
     shell->metrics()->RecordUserMetricsAction(ash::UMA_TRAY_LOCK_SCREEN);
     tray_delegate->RequestLockScreen();
   } else {
     NOTREACHED();
   }
 }
 
 void DateDefaultView::OnShutdownPolicyChanged(bool reboot_on_shutdown) {
   if (!shutdown_button_)
     return;
 
   shutdown_button_->SetTooltipText(l10n_util::GetStringUTF16(
       reboot_on_shutdown ? IDS_ASH_STATUS_TRAY_REBOOT
                          : IDS_ASH_STATUS_TRAY_SHUTDOWN));
 }
 
 }  // namespace ash