Move ui/gfx/animation/ into its own component.

ui/gfx/animation/tween.h

 // Copyright (c) 2012 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 UI_GFX_ANIMATION_TWEEN_H_
 #define UI_GFX_ANIMATION_TWEEN_H_
 
 #include "base/macros.h"
 #include "third_party/skia/include/core/SkColor.h"
+#include "ui/gfx/animation/animation_export.h"
 #include "ui/gfx/geometry/rect.h"
-#include "ui/gfx/gfx_export.h"
 #include "ui/gfx/transform.h"
 
 namespace base {
 class TimeTicks;
 }
 
 namespace gfx {
 
-class GFX_EXPORT Tween {
+class ANIMATION_EXPORT Tween {
  public:
   enum Type {
     LINEAR,             // Linear.
     EASE_OUT,           // Fast in, slow out (default).
     EASE_IN,            // Slow in, fast out.
     EASE_IN_2,          // Variant of EASE_IN that starts out slower than
                         // EASE_IN.
     EASE_IN_OUT,        // Slow in and out, fast in the middle.
     FAST_IN_OUT,        // Fast in and out, slow in the middle.
     EASE_OUT_SNAP,      // Fast in, slow out, snap to final value.
@@ skipping 41 matching lines @@
  private:
   Tween();
   ~Tween();
 
   DISALLOW_COPY_AND_ASSIGN(Tween);
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_ANIMATION_TWEEN_H_