Update Surface ID Terminology

cc/surfaces/display.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 CC_SURFACES_DISPLAY_H_
 #define CC_SURFACES_DISPLAY_H_
 
 #include <memory>
 #include <vector>
 
@@ skipping 54 matching lines @@
           std::unique_ptr<OutputSurface> output_surface,
           std::unique_ptr<DisplayScheduler> scheduler,
           std::unique_ptr<TextureMailboxDeleter> texture_mailbox_deleter);
 
   ~Display() override;
 
   void Initialize(DisplayClient* client);
 
   // device_scale_factor is used to communicate to the external window system
   // what scale this was rendered at.
-  void SetSurfaceId(SurfaceId id, float device_scale_factor);
+  void SetSurfaceId(const SurfaceId& id, float device_scale_factor);
   void Resize(const gfx::Size& new_size);
   void SetColorSpace(const gfx::ColorSpace& color_space);
   void SetExternalClip(const gfx::Rect& clip);
   void SetOutputIsSecure(bool secure);
 
-  SurfaceId CurrentSurfaceId();
+  const SurfaceId& CurrentSurfaceId();
 
   // DisplaySchedulerClient implementation.
   bool DrawAndSwap() override;
 
   // OutputSurfaceClient implementation.
   void CommitVSyncParameters(base::TimeTicks timebase,
                              base::TimeDelta interval) override;
   void SetBeginFrameSource(BeginFrameSource* source) override;
   void SetNeedsRedrawRect(const gfx::Rect& damage_rect) override;
   void DidSwapBuffers() override;
   void DidSwapBuffersComplete() override;
   void DidReceiveTextureInUseResponses(
       const gpu::TextureInUseResponses& responses) override;
   void ReclaimResources(const CompositorFrameAck* ack) override;
   void DidLoseOutputSurface() override;
   void SetExternalTilePriorityConstraints(
       const gfx::Rect& viewport_rect,
       const gfx::Transform& transform) override;
   void SetMemoryPolicy(const ManagedMemoryPolicy& policy) override;
   void SetTreeActivationCallback(const base::Closure& callback) override;
   void OnDraw(const gfx::Transform& transform,
               const gfx::Rect& viewport,
               const gfx::Rect& clip,
               bool resourceless_software_draw) override;
 
   // RendererClient implementation.
   void SetFullRootLayerDamage() override;
 
   // SurfaceDamageObserver implementation.
-  void OnSurfaceDamaged(SurfaceId surface, bool* changed) override;
+  void OnSurfaceDamaged(const SurfaceId& surface, bool* changed) override;
 
   void SetEnlargePassTextureAmountForTesting(
       const gfx::Size& enlarge_texture_amount) {
     enlarge_texture_amount_ = enlarge_texture_amount;
   }
 
  private:
   void InitializeRenderer();
   void UpdateRootSurfaceResourcesLocked();
 
@@ skipping 24 matching lines @@
   SoftwareRenderer* software_renderer_ = nullptr;
   std::vector<ui::LatencyInfo> stored_latency_info_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(Display);
 };
 
 }  // namespace cc
 
 #endif  // CC_SURFACES_DISPLAY_H_