[#2] Pass gfx structs by const ref (gfx::Rect, gfx::RectF)

cc/quads/stream_video_draw_quad.cc

Index: cc/quads/stream_video_draw_quad.cc
diff --git a/cc/quads/stream_video_draw_quad.cc b/cc/quads/stream_video_draw_quad.cc
index c239256ac51ffaeee16be5dda5d2dee6d31f2b88..0ae396214e412da687a6bd12eb7fa2e1d279993f 100644
--- a/cc/quads/stream_video_draw_quad.cc
+++ b/cc/quads/stream_video_draw_quad.cc
@@ -17,8 +17,8 @@ scoped_ptr<StreamVideoDrawQuad> StreamVideoDrawQuad::Create() {
 }
 
 void StreamVideoDrawQuad::SetNew(const SharedQuadState* shared_quad_state,
-                                 gfx::Rect rect,
-                                 gfx::Rect opaque_rect,
+                                 const gfx::Rect& rect,
+                                 const gfx::Rect& opaque_rect,
                                  unsigned resource_id,
                                  const gfx::Transform& matrix) {
   gfx::Rect visible_rect = rect;
@@ -30,9 +30,9 @@ void StreamVideoDrawQuad::SetNew(const SharedQuadState* shared_quad_state,
 }
 
 void StreamVideoDrawQuad::SetAll(const SharedQuadState* shared_quad_state,
-                                 gfx::Rect rect,
-                                 gfx::Rect opaque_rect,
-                                 gfx::Rect visible_rect,
+                                 const gfx::Rect& rect,
+                                 const gfx::Rect& opaque_rect,
+                                 const gfx::Rect& visible_rect,
                                  bool needs_blending,
                                  unsigned resource_id,
                                  const gfx::Transform& matrix) {