Communicate MT changes to impl-only scroll offset animations

third_party/WebKit/Source/platform/animation/CompositorAnimationHostTest.cpp

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "platform/animation/CompositorAnimationTimeline.h"
+#include "platform/animation/CompositorAnimationHost.h"
 
 #include "base/memory/ref_counted.h"
-#include "cc/animation/animation_host.h"
-#include "platform/animation/CompositorAnimationPlayer.h"
+#include "platform/animation/CompositorAnimationTimeline.h"
 #include "platform/testing/CompositorTest.h"
 #include "platform/testing/WebLayerTreeViewImplForTesting.h"
 
 namespace blink {
 
-class CompositorAnimationTimelineTest : public CompositorTest {
+class CompositorAnimationHostTest : public CompositorTest {
 };
 
-TEST_F(CompositorAnimationTimelineTest, CompositorTimelineDeletionDetachesFromAnimationHost)
+TEST_F(CompositorAnimationHostTest, AnimationHostNullWhenTimelineDetached)
 {
     OwnPtr<CompositorAnimationTimeline> timeline = adoptPtr(new CompositorAnimationTimeline);
 
     scoped_refptr<cc::AnimationTimeline> ccTimeline = timeline->animationTimeline();
     EXPECT_FALSE(ccTimeline->animation_host());
+    EXPECT_TRUE(timeline->compositorAnimationHost().isNull());
 
     OwnPtr<WebLayerTreeView> layerTreeHost = adoptPtr(new WebLayerTreeViewImplForTesting);
     DCHECK(layerTreeHost);
 
     layerTreeHost->attachCompositorAnimationTimeline(timeline->animationTimeline());
-    cc::AnimationHost* animationHost = ccTimeline->animation_host();
-    EXPECT_TRUE(animationHost);
-    EXPECT_TRUE(animationHost->GetTimelineById(ccTimeline->id()));
+    EXPECT_FALSE(timeline->compositorAnimationHost().isNull());
 
-    // Delete CompositorAnimationTimeline while attached to host.
-    timeline = nullptr;
-
-    EXPECT_FALSE(ccTimeline->animation_host());
-    EXPECT_FALSE(animationHost->GetTimelineById(ccTimeline->id()));
+    layerTreeHost->detachCompositorAnimationTimeline(timeline->animationTimeline());
+    EXPECT_TRUE(timeline->compositorAnimationHost().isNull());
 }
 
 } // namespace blink