scheduler: Throttle timers in out-of-view frames

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 <memory>
 #include <set>
 #include <string>
@@ skipping 17 matching lines @@
 namespace scheduler {
 
 class AutoAdvancingVirtualTimeDomain;
 class RendererSchedulerImpl;
 class WebFrameSchedulerImpl;
 
 class SCHEDULER_EXPORT WebViewSchedulerImpl : public blink::WebViewScheduler {
  public:
   WebViewSchedulerImpl(blink::WebView* web_view,
                        RendererSchedulerImpl* renderer_scheduler,
-                       bool disable_background_timer_throttling);
+                       bool disable_background_timer_throttling,
+                       bool allow_hidden_timer_throttling);
 
   ~WebViewSchedulerImpl() override;
 
   // blink::WebViewScheduler implementation:
   void setPageVisible(bool page_visible) override;
   std::unique_ptr<blink::WebFrameScheduler> createFrameScheduler(
       blink::BlameContext* blame_context) override;
   void enableVirtualTime() override;
   void setAllowVirtualTimeToAdvance(
       bool allow_virtual_time_to_advance) override;
@@ skipping 14 matching lines @@
   }
 
   std::set<WebFrameSchedulerImpl*> frame_schedulers_;
   std::unique_ptr<AutoAdvancingVirtualTimeDomain> virtual_time_domain_;
   TaskQueue::PumpPolicy virtual_time_pump_policy_;
   blink::WebView* web_view_;
   RendererSchedulerImpl* renderer_scheduler_;
   bool page_visible_;
   bool disable_background_timer_throttling_;
   bool allow_virtual_time_to_advance_;
+  bool allow_hidden_timer_throttling_;
 
   DISALLOW_COPY_AND_ASSIGN(WebViewSchedulerImpl);
 };
 
 }  // namespace scheduler
 
 #endif  // COMPONENTS_SCHEDULER_RENDERER_WEB_VIEW_SCHEDULER_IMPL_H_