[scheduler] Use Finch to control background throttling.

third_party/WebKit/Source/web/WebViewImpl.h

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 82 matching lines @@
 class WebPlugin;
 class WebRemoteFrame;
 class WebSettingsImpl;
 class WebViewScheduler;
 
 class WEB_EXPORT WebViewImpl final
     : WTF_NON_EXPORTED_BASE(public WebView),
       public RefCounted<WebViewImpl>,
       WTF_NON_EXPORTED_BASE(public WebGestureCurveTarget),
       public PageWidgetEventHandler,
-      public WebScheduler::InterventionReporter {
+      public WebScheduler::InterventionReporter,
+      public WebViewScheduler::WebViewSchedulerSettings {
  public:
   static WebViewImpl* create(WebViewClient*, WebPageVisibilityState);
   static HashSet<WebViewImpl*>& allInstances();
 
   // WebWidget methods:
   void close() override;
   WebSize size() override;
   void resize(const WebSize&) override;
   void resizeVisualViewport(const WebSize&) override;
   void didEnterFullscreen() override;
@@ skipping 158 matching lines @@
   bool isFlinging() const override { return !!m_gestureAnimation.get(); }
   void setShowPaintRects(bool) override;
   void setShowDebugBorders(bool);
   void setShowFPSCounter(bool) override;
   void setShowScrollBottleneckRects(bool) override;
   void acceptLanguagesChanged() override;
 
   // WebScheduler::InterventionReporter implementation:
   void ReportIntervention(const WebString& message) override;
 
+  // WebViewScheduler::WebViewSchedulerSettings implementation:
+  float expensiveBackgroundThrottlingCPUBudget() override;
+  float expensiveBackgroundThrottlingInitialBudget() override;
+  float expensiveBackgroundThrottlingMaxBudget() override;
+  float expensiveBackgroundThrottlingMaxDelay() override;
+
   void didUpdateFullscreenSize();
 
   float defaultMinimumPageScaleFactor() const;
   float defaultMaximumPageScaleFactor() const;
   float minimumPageScaleFactor() const;
   float maximumPageScaleFactor() const;
   float clampPageScaleFactorToLimits(float) const;
   void resetScaleStateImmediately();
 
   HitTestResult coreHitTestResultAt(const WebPoint&);
@@ skipping 467 matching lines @@
   Persistent<ResizeViewportAnchor> m_resizeViewportAnchor;
 };
 
 // We have no ways to check if the specified WebView is an instance of
 // WebViewImpl because WebViewImpl is the only implementation of WebView.
 DEFINE_TYPE_CASTS(WebViewImpl, WebView, webView, true, true);
 
 }  // namespace blink
 
 #endif