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

ui/gfx/transform.h

Index: ui/gfx/transform.h
===================================================================
--- ui/gfx/transform.h	(revision 91577)
+++ ui/gfx/transform.h	(working copy)
@@ -9,6 +9,7 @@
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "third_party/skia/include/core/SkMatrix.h"
+#include "ui/ui_api.h"
 
 namespace gfx {
 class Point;
@@ -20,7 +21,7 @@
 // 3x3 transformation matrix. Transform is cheap and explicitly allows
 // copy/assign.
 // TODO: make this a 4x4.
-class Transform {
+class UI_API Transform {
  public:
   Transform();
   ~Transform();