CC Animation: Move PropertyAnimationState and TargetProperty to trees.

cc/trees/property_animation_state.h

Index: cc/trees/property_animation_state.h
diff --git a/cc/animation/property_animation_state.h b/cc/trees/property_animation_state.h
similarity index 84%
rename from cc/animation/property_animation_state.h
rename to cc/trees/property_animation_state.h
index 642576364e1f94005f68894083ea38575ad20107..173ea921da2a3e3118907b84dbb2f367fc264436 100644
--- a/cc/animation/property_animation_state.h
+++ b/cc/trees/property_animation_state.h
@@ -2,11 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef CC_ANIMATION_PROPERTY_ANIMATION_STATE_H_
-#define CC_ANIMATION_PROPERTY_ANIMATION_STATE_H_
+#ifndef CC_TREES_PROPERTY_ANIMATION_STATE_H_
+#define CC_TREES_PROPERTY_ANIMATION_STATE_H_
 
-#include "cc/animation/target_property.h"
 #include "cc/base/cc_export.h"
+#include "cc/trees/target_property.h"
 
 namespace cc {
 
@@ -35,4 +35,4 @@ PropertyAnimationState operator^(const PropertyAnimationState& lhs,
 
 }  // namespace cc
 
-#endif  // CC_ANIMATION_PROPERTY_ANIMATION_STATE_H_
+#endif  // CC_TREES_PROPERTY_ANIMATION_STATE_H_