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

cc/quads/solid_color_draw_quad.cc

Index: cc/quads/solid_color_draw_quad.cc
diff --git a/cc/quads/solid_color_draw_quad.cc b/cc/quads/solid_color_draw_quad.cc
index ae3b91422090f68b94df305f06ea670ed898c58f..d0b9ec84a6714e04e193fa799b63ee39ea7aa946 100644
--- a/cc/quads/solid_color_draw_quad.cc
+++ b/cc/quads/solid_color_draw_quad.cc
@@ -17,7 +17,7 @@ scoped_ptr<SolidColorDrawQuad> SolidColorDrawQuad::Create() {
 }
 
 void SolidColorDrawQuad::SetNew(const SharedQuadState* shared_quad_state,
-                                gfx::Rect rect,
+                                const gfx::Rect& rect,
                                 SkColor color,
                                 bool force_anti_aliasing_off) {
   gfx::Rect opaque_rect = SkColorGetA(color) == 255 ? rect : gfx::Rect();
@@ -30,9 +30,9 @@ void SolidColorDrawQuad::SetNew(const SharedQuadState* shared_quad_state,
 }
 
 void SolidColorDrawQuad::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,
                                 SkColor color,
                                 bool force_anti_aliasing_off) {