Disable rendering when suspending on chrome os

chrome/browser/chromeos/login/lock/webui_screen_locker.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 "chrome/browser/chromeos/login/lock/webui_screen_locker.h"
 
+#include "ash/shell.h"
+#include "ash/system/chromeos/power/power_event_observer.h"
 #include "ash/wm/lock_state_controller.h"
 #include "ash/wm/lock_state_observer.h"
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
 #include "chrome/browser/browser_shutdown.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/chromeos/accessibility/accessibility_util.h"
 #include "chrome/browser/chromeos/login/helper.h"
@@ skipping 179 matching lines @@
   webui_ready_ = true;
   if (lock_ready_)
     ScreenLockReady();
 }
 
 void WebUIScreenLocker::OnLockBackgroundDisplayed() {
   UMA_HISTOGRAM_TIMES("LockScreen.BackgroundReady",
                       base::TimeTicks::Now() - lock_time_);
 }
 
+void WebUIScreenLocker::OnHeaderBarVisible() {
+  DCHECK(ash::Shell::HasInstance());
+
+  ash::Shell::GetInstance()->power_event_observer()->OnLockAnimationsComplete();
+}
+
 OobeUI* WebUIScreenLocker::GetOobeUI() {
   return static_cast<OobeUI*>(GetWebUI()->GetController());
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // WebUIScreenLocker, LoginDisplay::Delegate:
 
 void WebUIScreenLocker::CancelPasswordChangedFlow()  {
   NOTREACHED();
 }
@@ skipping 189 matching lines @@
   }
 
   if (GetOobeUI()) {
     const gfx::Size& size = primary_display.size();
     GetOobeUI()->GetCoreOobeActor()->SetClientAreaSize(size.width(),
                                                        size.height());
   }
 }
 
 }  // namespace chromeos