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

cc/test/render_pass_test_utils.h

Index: cc/test/render_pass_test_utils.h
diff --git a/cc/test/render_pass_test_utils.h b/cc/test/render_pass_test_utils.h
index 650cbc03dc0d5e033c4041bc05400fb8fa99d37d..db739b9518bdc947cb12b1d9fbea4a61cfe7dba1 100644
--- a/cc/test/render_pass_test_utils.h
+++ b/cc/test/render_pass_test_utils.h
@@ -26,22 +26,22 @@ class TestRenderPass;
 TestRenderPass* AddRenderPass(
     RenderPassList* pass_list,
     RenderPass::Id id,
-    gfx::Rect output_rect,
+    const gfx::Rect& output_rect,
     const gfx::Transform& root_transform);
 
 // Adds a solid quad to a given render pass.
 SolidColorDrawQuad* AddQuad(TestRenderPass* pass,
-                            gfx::Rect rect,
+                            const gfx::Rect& rect,
                             SkColor color);
 
 // Adds a solid quad to a given render pass and sets is_clipped=true.
 SolidColorDrawQuad* AddClippedQuad(TestRenderPass* pass,
-                                   gfx::Rect rect,
+                                   const gfx::Rect& rect,
                                    SkColor color);
 
 // Adds a solid quad with a transform to a given render pass.
 SolidColorDrawQuad* AddTransformedQuad(TestRenderPass* pass,
-                                       gfx::Rect rect,
+                                       const gfx::Rect& rect,
                                        SkColor color,
                                        const gfx::Transform& transform);