Add a flag disable background timer alignment

components/scheduler/renderer/web_view_scheduler_impl.h

 // Copyright 2015 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.
 
 #ifndef COMPONENTS_SCHEDULER_RENDERER_WEB_VIEW_SCHEDULER_IMPL_H_
 #define COMPONENTS_SCHEDULER_RENDERER_WEB_VIEW_SCHEDULER_IMPL_H_
 
 #include <set>
 
 #include "base/macros.h"
@@ skipping 10 matching lines @@
 }  // namespace blink
 
 namespace scheduler {
 
 class RendererSchedulerImpl;
 class WebFrameSchedulerImpl;
 
 class SCHEDULER_EXPORT WebViewSchedulerImpl : public blink::WebViewScheduler {
  public:
   WebViewSchedulerImpl(blink::WebView* web_view,
-                       RendererSchedulerImpl* renderer_scheduler);
+                       RendererSchedulerImpl* renderer_scheduler,
+                       bool disable_background_timer_throttling);
 
   ~WebViewSchedulerImpl() override;
 
   // blink::WebViewScheduler implementation:
   void setPageInBackground(bool page_in_background) override;
   blink::WebPassOwnPtr<blink::WebFrameScheduler> createFrameScheduler()
       override;
 
   blink::WebView* web_view() const { return web_view_; }
 
   scoped_ptr<WebFrameSchedulerImpl> createWebFrameSchedulerImpl();
 
  private:
   friend class WebFrameSchedulerImpl;
 
   void Unregister(WebFrameSchedulerImpl* frame_scheduler);
 
   std::set<WebFrameSchedulerImpl*> frame_schedulers_;
   blink::WebView* web_view_;
   RendererSchedulerImpl* renderer_scheduler_;
   bool page_in_background_;
+  bool disable_background_timer_throttling_;
 
   DISALLOW_COPY_AND_ASSIGN(WebViewSchedulerImpl);
 };
 
 }  // namespace scheduler
 
 #endif  // COMPONENTS_SCHEDULER_RENDERER_WEB_VIEW_SCHEDULER_IMPL_H_