NOT FOR REVIEW - convert to cc animation

chrome/browser/android/vr_shell/ui_scene.h

Index: chrome/browser/android/vr_shell/ui_scene.h
diff --git a/chrome/browser/android/vr_shell/ui_scene.h b/chrome/browser/android/vr_shell/ui_scene.h
index 12bf9df514d1cdc422edae39bca33c104d16be7d..a914b230e9adb5396abdd40e244af8203106e798 100644
--- a/chrome/browser/android/vr_shell/ui_scene.h
+++ b/chrome/browser/android/vr_shell/ui_scene.h
@@ -17,11 +17,14 @@
 namespace base {
 class ListValue;
 class TimeTicks;
-}
+}  // namespace base
+
+namespace cc {
+class Animation;
+}  // namespace cc
 
 namespace vr_shell {
 
-class Animation;
 class UiElement;
 
 class UiScene {
@@ -43,7 +46,7 @@ class UiScene {
   void RemoveUiElement(int element_id);
 
   // Add an animation to the scene, on element |element_id|.
-  void AddAnimation(int element_id, std::unique_ptr<Animation> animation);
+  void AddAnimation(int element_id, std::unique_ptr<cc::Animation> animation);
 
   // Remove |animation_id| from element |element_id|.
   void RemoveAnimation(int element_id, int animation_id);