Blink CompositorWorker: Use CompositorElementId and CompositorIdToElementMap.

third_party/WebKit/Source/core/animation/ElementAnimations.h

 /*
  * Copyright (C) 2013 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 16 matching lines @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef ElementAnimations_h
 #define ElementAnimations_h
 
 #include "core/animation/AnimationStack.h"
 #include "core/animation/CustomCompositorAnimations.h"
 #include "core/animation/css/CSSAnimations.h"
+#include "platform/graphics/CompositorElementId.h"
 #include "wtf/HashCountedSet.h"
 #include "wtf/HashMap.h"
 #include "wtf/RefPtr.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
 class CSSAnimations;
 
 using AnimationCountedSet = HeapHashCountedSet<WeakMember<Animation>>;
@@ skipping 25 matching lines @@
 
     void restartAnimationOnCompositor();
 
     void updateAnimationFlags(ComputedStyle&);
     void setAnimationStyleChange(bool animationStyleChange) { m_animationStyleChange = animationStyleChange; }
 
     const ComputedStyle* baseComputedStyle() const;
     void updateBaseComputedStyle(const ComputedStyle*);
     void clearBaseComputedStyle();
 
+    CompositorElementId compositorElementId() const { return m_compositorElementId; }
+
     DECLARE_TRACE();
 
 private:
     bool isAnimationStyleChange() const;
 
     AnimationStack m_animationStack;
     CustomCompositorAnimations m_customCompositorAnimations;
     CSSAnimations m_cssAnimations;
     AnimationCountedSet m_animations;
+    const CompositorElementId m_compositorElementId;
     bool m_animationStyleChange;
     RefPtr<ComputedStyle> m_baseComputedStyle;
 
     // CSSAnimations and DeferredLegacyStyleInterpolation checks if a style change is due to animation.
     friend class CSSAnimations;
     friend class DeferredLegacyStyleInterpolation;
 };
 
 } // namespace blink
 
 #endif // ElementAnimations_h