[#7] Resubmitted - Pass gfx structs by const ref (gfx::Size)

cc/quads/io_surface_draw_quad.h

Index: cc/quads/io_surface_draw_quad.h
diff --git a/cc/quads/io_surface_draw_quad.h b/cc/quads/io_surface_draw_quad.h
index c2307ceaddb1824ebdf5a2034cfd46392e978a22..d4a58b8daa00c8898cea9fd6b48a4195b38a0a15 100644
--- a/cc/quads/io_surface_draw_quad.h
+++ b/cc/quads/io_surface_draw_quad.h
@@ -24,7 +24,7 @@ class CC_EXPORT IOSurfaceDrawQuad : public DrawQuad {
   void SetNew(const SharedQuadState* shared_quad_state,
               const gfx::Rect& rect,
               const gfx::Rect& opaque_rect,
-              gfx::Size io_surface_size,
+              const gfx::Size& io_surface_size,
               unsigned io_surface_resource_id,
               Orientation orientation);
 
@@ -33,7 +33,7 @@ class CC_EXPORT IOSurfaceDrawQuad : public DrawQuad {
               const gfx::Rect& opaque_rect,
               const gfx::Rect& visible_rect,
               bool needs_blending,
-              gfx::Size io_surface_size,
+              const gfx::Size& io_surface_size,
               unsigned io_surface_resource_id,
               Orientation orientation);