CC Animation: Expose TargetProperty enum to be aliased in Blink Platform.

cc/test/test_hooks.h

 // Copyright 2015 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 CC_TEST_TEST_HOOKS_H_
 #define CC_TEST_TEST_HOOKS_H_
 
 #include "base/macros.h"
 #include "cc/animation/animation_delegate.h"
 #include "cc/trees/layer_tree_host.h"
@@ skipping 111 matching lines @@
   virtual void ReceivedRequestNewOutputSurface() {}
   virtual void ReceivedDidInitializeOutputSurface(
       bool success,
       const RendererCapabilities& capabilities) {}
   virtual void ReceivedDidCompletePageScaleAnimation() {}
   virtual void ReceivedPostFrameTimingEventsOnMain() {}
   virtual void ReceivedBeginMainFrame() {}
 
   // Implementation of AnimationDelegate:
   void NotifyAnimationStarted(base::TimeTicks monotonic_time,
-                              Animation::TargetProperty target_property,
+                              AnimationTargetProperty target_property,
                               int group) override {}
   void NotifyAnimationFinished(base::TimeTicks monotonic_time,
-                               Animation::TargetProperty target_property,
+                               AnimationTargetProperty target_property,
                                int group) override {}
   void NotifyAnimationAborted(base::TimeTicks monotonic_time,
-                              Animation::TargetProperty target_property,
+                              AnimationTargetProperty target_property,
                               int group) override {}
 
   virtual void RequestNewOutputSurface() = 0;
 
   // Used to notify the test to create the Remote client LayerTreeHost on
   // receiving a CompositorMessageToImpl of type INITIALIZE_IMPL.
   virtual void CreateRemoteClientHost(
       const proto::CompositorMessageToImpl& proto) {}
 
   // Used to notify the test to destroy the Remote client LayerTreeHost on
   // receiving a CompositorMessageToImpl of type CLOSE_IMPL.
   virtual void DestroyRemoteClientHost() {}
 };
 
 }  // namespace cc
 
 #endif  // CC_TEST_TEST_HOOKS_H_