CC Animation: Move PropertyAnimationState and TargetProperty to trees.

cc/trees/mutator_host_client.h

Index: cc/trees/mutator_host_client.h
diff --git a/cc/trees/mutator_host_client.h b/cc/trees/mutator_host_client.h
index 193dc65b24ca73d5ccd91e3c632c99c07a097dde..d3a3e0e768354e21f66f3716471860282873c7ad 100644
--- a/cc/trees/mutator_host_client.h
+++ b/cc/trees/mutator_host_client.h
@@ -5,10 +5,9 @@
 #ifndef CC_TREES_MUTATOR_HOST_CLIENT_H_
 #define CC_TREES_MUTATOR_HOST_CLIENT_H_
 
-// TODO(loyso) Move these headers out of cc/animation.
-#include "cc/animation/property_animation_state.h"
-#include "cc/animation/target_property.h"
 #include "cc/trees/element_id.h"
+#include "cc/trees/property_animation_state.h"
+#include "cc/trees/target_property.h"
 
 namespace gfx {
 class Transform;