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

cc/quads/render_pass.cc

Index: cc/quads/render_pass.cc
diff --git a/cc/quads/render_pass.cc b/cc/quads/render_pass.cc
index 53cb83703a3de51c95d1fbcbc3572242d825b4ed..cdf3b94c3c5635ec40cb6809e0c7914fd8a938c4 100644
--- a/cc/quads/render_pass.cc
+++ b/cc/quads/render_pass.cc
@@ -112,8 +112,8 @@ void RenderPass::CopyAll(const ScopedPtrVector<RenderPass>& in,
 }
 
 void RenderPass::SetNew(Id id,
-                        gfx::Rect output_rect,
-                        gfx::RectF damage_rect,
+                        const gfx::Rect& output_rect,
+                        const gfx::RectF& damage_rect,
                         const gfx::Transform& transform_to_root_target) {
   DCHECK_GT(id.layer_id, 0);
   DCHECK_GE(id.index, 0);
@@ -128,8 +128,8 @@ void RenderPass::SetNew(Id id,
 }
 
 void RenderPass::SetAll(Id id,
-                        gfx::Rect output_rect,
-                        gfx::RectF damage_rect,
+                        const gfx::Rect& output_rect,
+                        const gfx::RectF& damage_rect,
                         const gfx::Transform& transform_to_root_target,
                         bool has_transparent_background) {
   DCHECK_GT(id.layer_id, 0);