Remove last dependencies on ui/base from ui/gfx

ui/gfx/favicon_size.h

Index: ui/gfx/favicon_size.h
diff --git a/ui/gfx/favicon_size.h b/ui/gfx/favicon_size.h
index ecab851dc1a4e174da2dafe5a83d39ba98ac3eb2..ad51a9bdb005b93e7e0f3efadc0ab8b3f22e7920 100644
--- a/ui/gfx/favicon_size.h
+++ b/ui/gfx/favicon_size.h
@@ -10,12 +10,12 @@
 namespace gfx {
 
 // Size (along each axis) of the favicon.
-UI_EXPORT extern const int kFaviconSize;
+GFX_EXPORT extern const int kFaviconSize;
 
 // If the width or height is bigger than the favicon size, a new width/height
 // is calculated and returned in width/height that maintains the aspect
 // ratio of the supplied values.
-UI_EXPORT void CalculateFaviconTargetSize(int* width, int* height);
+GFX_EXPORT void CalculateFaviconTargetSize(int* width, int* height);
 
 }  // namespace gfx