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

cc/layers/layer_unittest.cc

Index: cc/layers/layer_unittest.cc
diff --git a/cc/layers/layer_unittest.cc b/cc/layers/layer_unittest.cc
index a1d18ae6771fffcd4436e9c28110feeb6b10d0e4..59b05c944df80baeea09f853b3ec7a80ba552e95 100644
--- a/cc/layers/layer_unittest.cc
+++ b/cc/layers/layer_unittest.cc
@@ -1708,7 +1708,7 @@ TEST_F(LayerTest,
     AddOpacityTransitionToController(impl_layer->layer_animation_controller(),
                                      1.0, 0.3f, 0.7f, false);
     impl_layer->layer_animation_controller()
-        ->GetAnimation(Animation::OPACITY)
+        ->GetAnimation(TargetProperty::OPACITY)
         ->set_is_impl_only(true);
   }
   EXPECT_SET_NEEDS_COMMIT(1, test_layer->SetOpacity(0.75f));
@@ -1759,7 +1759,7 @@ TEST_F(LayerTest,
     AddAnimatedFilterToController(impl_layer->layer_animation_controller(), 1.0,
                                   1.f, 2.f);
     impl_layer->layer_animation_controller()
-        ->GetAnimation(Animation::FILTER)
+        ->GetAnimation(TargetProperty::FILTER)
         ->set_is_impl_only(true);
   }
   filters.Append(FilterOperation::CreateSepiaFilter(0.5f));
@@ -2093,7 +2093,7 @@ static bool AddTestAnimation(Layer* layer) {
   curve->AddKeyframe(
       FloatKeyframe::Create(base::TimeDelta::FromSecondsD(1.0), 0.7f, nullptr));
   scoped_ptr<Animation> animation =
-      Animation::Create(std::move(curve), 0, 0, Animation::OPACITY);
+      Animation::Create(std::move(curve), 0, 0, TargetProperty::OPACITY);
 
   return layer->AddAnimation(std::move(animation));
 }