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

cc/blink/web_to_cc_animation_delegate_adapter.h

Index: cc/blink/web_to_cc_animation_delegate_adapter.h
diff --git a/cc/blink/web_to_cc_animation_delegate_adapter.h b/cc/blink/web_to_cc_animation_delegate_adapter.h
index 343afa51c230be85f7eeb78895f489525e796639..09787365604e643bc911f0201335f92bbb4fc6e4 100644
--- a/cc/blink/web_to_cc_animation_delegate_adapter.h
+++ b/cc/blink/web_to_cc_animation_delegate_adapter.h
@@ -22,13 +22,13 @@ class WebToCCAnimationDelegateAdapter : public cc::AnimationDelegate {
 
  private:
   void NotifyAnimationStarted(base::TimeTicks monotonic_time,
-                              cc::Animation::TargetProperty target_property,
+                              cc::TargetProperty::Type target_property,
                               int group) override;
   void NotifyAnimationFinished(base::TimeTicks monotonic_time,
-                               cc::Animation::TargetProperty target_property,
+                               cc::TargetProperty::Type target_property,
                                int group) override;
   void NotifyAnimationAborted(base::TimeTicks monotonic_time,
-                              cc::Animation::TargetProperty target_property,
+                              cc::TargetProperty::Type target_property,
                               int group) override;
 
   blink::WebCompositorAnimationDelegate* delegate_;