ui: Make gfx::Size::Scale() mutate the class. Add gfx::ScaleSize() similar to Rect/Point.

ui/gfx/rect_f.h

Index: ui/gfx/rect_f.h
diff --git a/ui/gfx/rect_f.h b/ui/gfx/rect_f.h
index f4d9bca0f02cb78027d3a48bb21adfbec5a364bc..f3e1ebfb45aacf36bb5de1acc545c3e40604c620 100644
--- a/ui/gfx/rect_f.h
+++ b/ui/gfx/rect_f.h
@@ -35,9 +35,7 @@ class UI_EXPORT RectF
 
   void Scale(float x_scale, float y_scale) {
     set_origin(ScalePoint(origin(), x_scale, y_scale));
-
-    SizeF newSize = size().Scale(x_scale, y_scale);

[tfarina, 2012/11/09 13:05:37]

nit: newSize, tisk, tisk :(

s/newSize/new_size.

[danakj, 2012/11/09 16:11:38]

I'm removing this code.

-    set_size(newSize);
+    set_size(ScaleSize(size(), x_scale, y_scale));
   }
 
   // This method reports if the RectF can be safely converted to an integer