Implement new AnimationTimeline superclass

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

Index: third_party/WebKit/Source/core/animation/Animation.h
diff --git a/third_party/WebKit/Source/core/animation/Animation.h b/third_party/WebKit/Source/core/animation/Animation.h
index 78d6044f84081ef42c6bc3f08276681ca585e93b..f8bec0aaad93f33f4693f67ba01534cde039a8c5 100644
--- a/third_party/WebKit/Source/core/animation/Animation.h
+++ b/third_party/WebKit/Source/core/animation/Animation.h
@@ -38,6 +38,7 @@
 #include "core/CSSPropertyNames.h"
 #include "core/CoreExport.h"
 #include "core/animation/AnimationEffectReadOnly.h"
+#include "core/animation/AnimationTimeline.h"
 #include "core/dom/ContextLifecycleObserver.h"
 #include "core/dom/DOMException.h"
 #include "core/events/EventTarget.h"
@@ -50,7 +51,6 @@
 
 namespace blink {
 
-class AnimationTimeline;
 class CompositorAnimationPlayer;
 class Element;
 class ExceptionState;
@@ -74,7 +74,7 @@ class CORE_EXPORT Animation final : public EventTargetWithInlineData,
     kFinished
   };
 
-  static Animation* Create(AnimationEffectReadOnly*, AnimationTimeline*);
+  static Animation* Create(AnimationEffectReadOnly*, SuperAnimationTimeline*);
 
   // Web Animations API IDL constructors.
   static Animation* Create(ExecutionContext*,
@@ -82,7 +82,7 @@ class CORE_EXPORT Animation final : public EventTargetWithInlineData,
                            ExceptionState&);
   static Animation* Create(ExecutionContext*,
                            AnimationEffectReadOnly*,
-                           AnimationTimeline*,
+                           SuperAnimationTimeline*,
                            ExceptionState&);
 
   ~Animation();
@@ -138,8 +138,11 @@ class CORE_EXPORT Animation final : public EventTargetWithInlineData,
 
   double playbackRate() const;
   void setPlaybackRate(double);
-  const AnimationTimeline* timeline() const { return timeline_; }
-  AnimationTimeline* timeline() { return timeline_; }
+  SuperAnimationTimeline* timeline() {
+    return static_cast<SuperAnimationTimeline*>(timeline_);
+  }
+  const AnimationTimeline* TimelineInternal() const { return timeline_; }
+  AnimationTimeline* TimelineInternal() { return timeline_; }

[alancutter (OOO until 2018), 2017/06/21 05:36:17]

Add TODO to remove the dependency on (future) DocumentTimeline.

 
   double CalculateStartTime(double current_time) const;
   bool HasStartTime() const { return !IsNull(start_time_); }