Fix some style issues in Rect I noticed.

gfx/rect.cc

Index: gfx/rect.cc
===================================================================
--- gfx/rect.cc	(revision 52415)
+++ gfx/rect.cc	(working copy)
@@ -93,13 +93,6 @@
 }
 #endif
 
-void Rect::set_width(int width) {
-  size_.set_width(width);
-}
-void Rect::set_height(int height) {
-  size_.set_height(height);
-}
-
 void Rect::SetRect(int x, int y, int width, int height) {
   origin_.SetPoint(x, y);
   set_width(width);