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

cc/quads/content_draw_quad_base.h

Index: cc/quads/content_draw_quad_base.h
diff --git a/cc/quads/content_draw_quad_base.h b/cc/quads/content_draw_quad_base.h
index d07bd368b17894d340d66a8b1fef51bb1ae616e8..44f8bd0c2ba6e1cc90be1305d184154ebb7829f5 100644
--- a/cc/quads/content_draw_quad_base.h
+++ b/cc/quads/content_draw_quad_base.h
@@ -21,7 +21,7 @@ class CC_EXPORT ContentDrawQuadBase : public DrawQuad {
               const gfx::Rect& rect,
               const gfx::Rect& opaque_rect,
               const gfx::RectF& tex_coord_rect,
-              gfx::Size texture_size,
+              const gfx::Size& texture_size,
               bool swizzle_contents);
 
   void SetAll(const SharedQuadState* shared_quad_state,
@@ -31,7 +31,7 @@ class CC_EXPORT ContentDrawQuadBase : public DrawQuad {
               const gfx::Rect& visible_rect,
               bool needs_blending,
               const gfx::RectF& tex_coord_rect,
-              gfx::Size texture_size,
+              const gfx::Size& texture_size,
               bool swizzle_contents);
 
   gfx::RectF tex_coord_rect;