Don't animate a progress bar if it isn't animated

third_party/WebKit/Source/core/layout/LayoutProgress.h

 /*
  * Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 28 matching lines @@
     bool isDeterminate() const;
     void updateFromElement() override;
 
     HTMLProgressElement* progressElement() const;
 
     const char* name() const override { return "LayoutProgress"; }
 
 protected:
     void willBeDestroyed() override;
 
+    bool isAnimating() const;
+    bool isAnimationTimerActive() const;
+
 private:
     bool isOfType(LayoutObjectType type) const override { return type == LayoutObjectProgress || LayoutBlockFlow::isOfType(type); }
 
     void animationTimerFired(Timer<LayoutProgress>*);
     void updateAnimationState();
 
     double m_position;
     double m_animationStartTime;
     double m_animationRepeatInterval;
     double m_animationDuration;
     bool m_animating;
     Timer<LayoutProgress> m_animationTimer;
+
+    friend class LayoutProgressTest;
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutProgress, isProgress());
 
 } // namespace blink
 
 #endif // LayoutProgress_h