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

ui/base/animation/animation.h

Index: ui/base/animation/animation.h
===================================================================
--- ui/base/animation/animation.h	(revision 92815)
+++ ui/base/animation/animation.h	(working copy)
@@ -25,7 +25,7 @@
 //
 // To subclass override Step, which is invoked as the animation progresses and
 // GetCurrentValue() to return the value appropriate to the animation.
-class Animation : public AnimationContainerElement {
+class UI_API Animation : public AnimationContainerElement {
  public:
   explicit Animation(base::TimeDelta timer_interval);
   virtual ~Animation();