Introduce ui.dll / libui.so for the component build.

ui/base/animation/tween.h

 // Copyright (c) 2011 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_BASE_ANIMATION_TWEEN_H_
 #define UI_BASE_ANIMATION_TWEEN_H_
 #pragma once
 
 #include "base/basictypes.h"
+#include "ui/ui_api.h"
 
 namespace gfx {
 class Rect;
 }
 
 namespace ui {
 
-class Tween {
+class UI_API Tween {
  public:
   enum Type {
     LINEAR,        // Linear.
     EASE_OUT,      // Fast in, slow out (default).
     EASE_IN,       // Slow in, fast out.
     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.
     ZERO,          // Returns a value of 0 always.
   };
@@ skipping 11 matching lines @@
  private:
   Tween();
   ~Tween();
 
   DISALLOW_COPY_AND_ASSIGN(Tween);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_ANIMATION_TWEEN_H_