Remove last dependencies on ui/base from ui/gfx

ui/gfx/size_f.h

Index: ui/gfx/size_f.h
diff --git a/ui/gfx/size_f.h b/ui/gfx/size_f.h
index ee90189f7d9b04533d50127f17e023065847996c..b9065273c8ed041e0fcb48c86cc5c7a05c4f5b41 100644
--- a/ui/gfx/size_f.h
+++ b/ui/gfx/size_f.h
@@ -14,7 +14,7 @@
 namespace gfx {
 
 // A floating version of gfx::Size.
-class UI_EXPORT SizeF : public SizeBase<SizeF, float> {
+class GFX_EXPORT SizeF : public SizeBase<SizeF, float> {
  public:
   SizeF() : SizeBase<SizeF, float>(0, 0) {}
   SizeF(float width, float height) : SizeBase<SizeF, float>(width, height) {}
@@ -39,7 +39,7 @@ inline bool operator!=(const SizeF& lhs, const SizeF& rhs) {
   return !(lhs == rhs);
 }
 
-UI_EXPORT SizeF ScaleSize(const SizeF& p, float x_scale, float y_scale);
+GFX_EXPORT SizeF ScaleSize(const SizeF& p, float x_scale, float y_scale);
 
 inline SizeF ScaleSize(const SizeF& p, float scale) {
   return ScaleSize(p, scale, scale);