CC Animation: Move PropertyAnimationState and TargetProperty to trees.

cc/trees/target_property.h

 // Copyright (c) 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef CC_ANIMATION_TARGET_PROPERTY_H_
-#define CC_ANIMATION_TARGET_PROPERTY_H_
+#ifndef CC_TREES_TARGET_PROPERTY_H_
+#define CC_TREES_TARGET_PROPERTY_H_
 
 #include <bitset>
 
 namespace cc {
 
 namespace TargetProperty {
 
 enum Type {
   TRANSFORM = 0,
   OPACITY,
   FILTER,
   SCROLL_OFFSET,
   BACKGROUND_COLOR,
   // These sentinels must be last
   FIRST_TARGET_PROPERTY = TRANSFORM,
   LAST_TARGET_PROPERTY = BACKGROUND_COLOR
 };
 
 const char* GetName(TargetProperty::Type property);
 
 }  // namespace TargetProperty
 
 // A set of target properties. TargetProperty must be 0-based enum.
 using TargetProperties = std::bitset<TargetProperty::LAST_TARGET_PROPERTY + 1>;
 
 }  // namespace cc
 
-#endif  // CC_ANIMATION_TARGET_PROPERTY_H_
+#endif  // CC_TREES_TARGET_PROPERTY_H_