Update Surface ID Terminology

ui/compositor/layer.h

 // Copyright (c) 2012 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 UI_COMPOSITOR_LAYER_H_
 #define UI_COMPOSITOR_LAYER_H_
 
 #include <stddef.h>
 
 #include <memory>
@@ skipping 279 matching lines @@
   // crbug.com/610086
   void SetTextureAlpha(float alpha);
 
   // The texture crop rectangle to be used. Empty rectangle means no cropping.
   void SetTextureCrop(const gfx::RectF& crop);
 
   // The texture scale to be used. Defaults to no scaling.
   void SetTextureScale(float x_scale, float y_scale);
 
   // Begins showing content from a surface with a particular id.
-  void SetShowSurface(cc::SurfaceId surface_id,
+  void SetShowSurface(const cc::SurfaceId& surface_id,
                       const cc::SurfaceLayer::SatisfyCallback& satisfy_callback,
                       const cc::SurfaceLayer::RequireCallback& require_callback,
                       gfx::Size surface_size,
                       float scale,
                       gfx::Size frame_size_in_dip);
 
   bool has_external_content() {
     return texture_layer_.get() || surface_layer_.get();
   }
 
@@ skipping 218 matching lines @@
   // The texture scale.
   float texture_x_scale_;
   float texture_y_scale_;
 
   DISALLOW_COPY_AND_ASSIGN(Layer);
 };
 
 }  // namespace ui
 
 #endif  // UI_COMPOSITOR_LAYER_H_