Communicate MT changes to impl-only scroll offset animations

third_party/WebKit/Source/platform/animation/CompositorAnimationHost.h

+// 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.
+
+#ifndef CompositorAnimationHost_h
+#define CompositorAnimationHost_h
+
+#include "base/memory/ref_counted.h"
+#include "cc/animation/animation_host.h"

[loyso (OOO), 2016/05/06 01:04:38]

You can use forward declaration here as well.

[ymalik, 2016/05/06 05:41:49]

Done.

+#include "cc/animation/scroll_offset_animations.h"
+#include "platform/PlatformExport.h"
+#include "wtf/Noncopyable.h"
+
+#include <memory>
+
+namespace blink {
+
+// A compositor representation for cc::AnimationHost.
+// This class wraps cc::AnimationHost and is currently only created from
+// CompositorAnimationTimeline::compositorAnimationHost.
+class PLATFORM_EXPORT CompositorAnimationHost {
+    WTF_MAKE_NONCOPYABLE(CompositorAnimationHost);
+public:
+    CompositorAnimationHost(cc::AnimationHost*);
+    virtual ~CompositorAnimationHost();
+
+    cc::AnimationHost* animationHost() const;
+
+    void addImplOnlyScrollOffsetAnimationUpdate(cc::ScrollOffsetAnimationUpdate);
+
+private:
+    cc::AnimationHost* m_animationHost;
+};
+
+} // namespace blink
+
+#endif // CompositorAnimationTimeline_h