Move throttling of background timers into the renderer scheduler

components/scheduler/renderer/web_view_scheduler_impl.h

Index: components/scheduler/renderer/web_view_scheduler_impl.h
diff --git a/components/scheduler/renderer/web_view_scheduler_impl.h b/components/scheduler/renderer/web_view_scheduler_impl.h
index 647d6d956bc31ea6c9feea1f6e626fad72909deb..a5dd7d787c003e3e1639dd20a79beafc829e80b6 100644
--- a/components/scheduler/renderer/web_view_scheduler_impl.h
+++ b/components/scheduler/renderer/web_view_scheduler_impl.h
@@ -8,6 +8,7 @@
 #include <set>
 
 #include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
 #include "components/scheduler/scheduler_export.h"
 #include "third_party/WebKit/public/platform/WebViewScheduler.h"
 
@@ -32,12 +33,14 @@ class SCHEDULER_EXPORT WebViewSchedulerImpl : public blink::WebViewScheduler {
   ~WebViewSchedulerImpl() override;
 
   // blink::WebViewScheduler implementation:
-  void setPageInBackground(bool background) override;
+  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;
 
@@ -46,7 +49,7 @@ class SCHEDULER_EXPORT WebViewSchedulerImpl : public blink::WebViewScheduler {
   std::set<WebFrameSchedulerImpl*> frame_schedulers_;
   blink::WebView* web_view_;
   RendererSchedulerImpl* renderer_scheduler_;
-  bool background_;
+  bool page_in_background_;
 
   DISALLOW_COPY_AND_ASSIGN(WebViewSchedulerImpl);
 };