Web Animations: Refactor KeyframeEffectModel to work via an InterpolationEffect.

Source/core/animation/DocumentTimelineTest.cpp

 /*
  * 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 141 matching lines @@
     RefPtrWillBeRawPtr<KeyframeEffectModel> effect = KeyframeEffectModel::create(KeyframeEffectModel::KeyframeVector());
     timing.fillMode = Timing::FillModeForwards;
     RefPtr<Animation> anim = Animation::create(element.get(), effect, timing);
 
     timeline->play(anim.get());
 
     platformTiming->expectNoMoreActions();
     updateClockAndService(0);
     EXPECT_FLOAT_EQ(0, timeline->currentTime());
     EXPECT_TRUE(anim->isInEffect());
-    EXPECT_TRUE(anim->compositableValues()->isEmpty());
+    EXPECT_TRUE(anim->activeInterpolations()->isEmpty());
 
     platformTiming->expectNoMoreActions();
     updateClockAndService(100);
     EXPECT_FLOAT_EQ(100, timeline->currentTime());
 }
 
 TEST_F(AnimationDocumentTimelineTest, ZeroTime)
 {
     timeline = DocumentTimeline::create(document.get());
 
@@ skipping 113 matching lines @@
 
 TEST_F(AnimationDocumentTimelineTest, UsePlayerAfterTimelineDeref)
 {
     RefPtr<Player> player = timeline->createPlayer(0);
     timeline.clear();
     // Test passes if this does not crash.
     player->setStartTime(0);
 }
 
 }