sync compositor: pass simple gfx types by const ref

content/renderer/android/synchronous_compositor_output_surface.h

Index: content/renderer/android/synchronous_compositor_output_surface.h
diff --git a/content/renderer/android/synchronous_compositor_output_surface.h b/content/renderer/android/synchronous_compositor_output_surface.h
index 3de40c75cab370b5258b4b7660e31475ced04ff0..337b066df431d78498fc0444dda8b219e11d787a 100644
--- a/content/renderer/android/synchronous_compositor_output_surface.h
+++ b/content/renderer/android/synchronous_compositor_output_surface.h
@@ -72,11 +72,11 @@ class SynchronousCompositorOutputSurface
 
   // Partial SynchronousCompositor API implementation.
   scoped_ptr<cc::CompositorFrame> DemandDrawHw(
-      gfx::Size surface_size,
+      const gfx::Size& surface_size,
       const gfx::Transform& transform,
-      gfx::Rect viewport,
-      gfx::Rect clip,
-      gfx::Rect viewport_rect_for_tile_priority,
+      const gfx::Rect& viewport,
+      const gfx::Rect& clip,
+      const gfx::Rect& viewport_rect_for_tile_priority,
       const gfx::Transform& transform_for_tile_priority);
   void ReturnResources(const cc::CompositorFrameAck& frame_ack);
   scoped_ptr<cc::CompositorFrame> DemandDrawSw(SkCanvas* canvas);
@@ -93,10 +93,10 @@ class SynchronousCompositorOutputSurface
   friend class SoftwareDevice;
 
   void InvokeComposite(const gfx::Transform& transform,
-                       gfx::Rect viewport,
-                       gfx::Rect clip,
-                       gfx::Rect viewport_rect_for_tile_priority,
-                       gfx::Transform transform_for_tile_priority,
+                       const gfx::Rect& viewport,
+                       const gfx::Rect& clip,
+                       const gfx::Rect& viewport_rect_for_tile_priority,
+                       const gfx::Transform& transform_for_tile_priority,
                        bool hardware_draw);
   bool CalledOnValidThread() const;