cc: Pass SurfaceId by const ref in more places

content/browser/renderer_host/delegated_frame_host.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_DELEGATED_FRAME_HOST_H_
 #define CONTENT_BROWSER_RENDERER_HOST_DELEGATED_FRAME_HOST_H_
 
 #include <stdint.h>
 
 #include <vector>
@@ skipping 153 matching lines @@
   // a compositor Surface.
   cc::SurfaceId SurfaceIdAtPoint(cc::SurfaceHittestDelegate* delegate,
                                  const gfx::Point& point,
                                  gfx::Point* transformed_point);
 
   // Given the SurfaceID of a Surface that is contained within this class'
   // Surface, find the relative transform between the Surfaces and apply it
   // to a point. If a Surface has not yet been created this returns the
   // same point with no transform applied.
   void TransformPointToLocalCoordSpace(const gfx::Point& point,
-                                       cc::SurfaceId original_surface,
+                                       const cc::SurfaceId& original_surface,
                                        gfx::Point* transformed_point);
 
   // Exposed for tests.
   cc::SurfaceId SurfaceIdForTesting() const { return surface_id_; }
   void OnCompositingDidCommitForTesting(ui::Compositor* compositor) {
     OnCompositingDidCommit(compositor);
   }
   bool ReleasedFrontLockActiveForTesting() const {
     return !!released_front_lock_.get();
   }
@@ skipping 143 matching lines @@
   // YUV readback pipeline.
   std::unique_ptr<display_compositor::ReadbackYUVInterface>
       yuv_readback_pipeline_;
 
   std::unique_ptr<DelegatedFrameEvictor> delegated_frame_evictor_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_DELEGATED_FRAME_HOST_H_