Rework timeline/frame scheduling logic for SVGImage

third_party/WebKit/Source/core/svg/graphics/SVGImageChromeClient.h

 /*
  * Copyright (C) 2012 Apple 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 26 matching lines @@
 class SVGImage;
 
 class SVGImageChromeClient final : public EmptyChromeClient {
 public:
     static SVGImageChromeClient* create(SVGImage*);
 
     bool isSVGImageChromeClient() const override;
 
     SVGImage* image() const { return m_image; }
 
+    void suspendAnimation();
+    void resumeAnimation();
+
 private:
     explicit SVGImageChromeClient(SVGImage*);
 
     void chromeDestroyed() override;
     void invalidateRect(const IntRect&) override;
     void scheduleAnimation(Widget*) override;
 
     void animationTimerFired(Timer<SVGImageChromeClient>*);
 
     SVGImage* m_image;
     Timer<SVGImageChromeClient> m_animationTimer;
+    enum {
+        Running,
+        Suspended,
+        SuspendedWithFramePending,
+    } m_timelineState;
 };
 
 DEFINE_TYPE_CASTS(SVGImageChromeClient, ChromeClient, client, client->isSVGImageChromeClient(), client.isSVGImageChromeClient());
 
 } // namespace blink
 
 #endif // SVGImageChromeClient_h