cc: Pass SurfaceId by const ref in more places

cc/surfaces/surface_factory.cc

 // 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.
 
 #include "cc/surfaces/surface_factory.h"
 
 #include <utility>
 
 #include "base/trace_event/trace_event.h"
 #include "cc/output/compositor_frame.h"
@@ skipping 21 matching lines @@
 }
 
 void SurfaceFactory::DestroyAll() {
   if (manager_) {
     for (auto& pair : surface_map_)
       manager_->Destroy(std::move(pair.second));
   }
   surface_map_.clear();
 }
 
-void SurfaceFactory::Create(SurfaceId surface_id) {
+void SurfaceFactory::Create(const SurfaceId& surface_id) {
   std::unique_ptr<Surface> surface(new Surface(surface_id, this));
   manager_->RegisterSurface(surface.get());
   DCHECK(!surface_map_.count(surface_id));
   surface_map_[surface_id] = std::move(surface);
 }
 
-void SurfaceFactory::Destroy(SurfaceId surface_id) {
+void SurfaceFactory::Destroy(const SurfaceId& surface_id) {
   OwningSurfaceMap::iterator it = surface_map_.find(surface_id);
   DCHECK(it != surface_map_.end());
   DCHECK(it->second->factory().get() == this);
   std::unique_ptr<Surface> surface(std::move(it->second));
   surface_map_.erase(it);
   if (manager_)
     manager_->Destroy(std::move(surface));
 }
 
-void SurfaceFactory::SetPreviousFrameSurface(SurfaceId new_id,
-                                             SurfaceId old_id) {
+void SurfaceFactory::SetPreviousFrameSurface(const SurfaceId& new_id,
+                                             const SurfaceId& old_id) {
   OwningSurfaceMap::iterator it = surface_map_.find(new_id);
   DCHECK(it != surface_map_.end());
   Surface* old_surface = manager_->GetSurfaceForId(old_id);
   if (old_surface) {
     it->second->SetPreviousFrameSurface(old_surface);
   }
 }
 
-void SurfaceFactory::SubmitCompositorFrame(SurfaceId surface_id,
+void SurfaceFactory::SubmitCompositorFrame(const SurfaceId& surface_id,
                                            CompositorFrame frame,
                                            const DrawCallback& callback) {
   TRACE_EVENT0("cc", "SurfaceFactory::SubmitCompositorFrame");
   OwningSurfaceMap::iterator it = surface_map_.find(surface_id);
   DCHECK(it != surface_map_.end());
   DCHECK(it->second->factory().get() == this);
   it->second->QueueFrame(std::move(frame), callback);
   if (!manager_->SurfaceModified(surface_id)) {
     TRACE_EVENT_INSTANT0("cc", "Damage not visible.", TRACE_EVENT_SCOPE_THREAD);
     it->second->RunDrawCallbacks(SurfaceDrawStatus::DRAW_SKIPPED);
   }
 }
 
 void SurfaceFactory::RequestCopyOfSurface(
-    SurfaceId surface_id,
+    const SurfaceId& surface_id,
     std::unique_ptr<CopyOutputRequest> copy_request) {
   OwningSurfaceMap::iterator it = surface_map_.find(surface_id);
   if (it == surface_map_.end()) {
     copy_request->SendEmptyResult();
     return;
   }
   DCHECK(it->second->factory().get() == this);
   it->second->RequestCopyOfOutput(std::move(copy_request));
   manager_->SurfaceModified(surface_id);
 }
 
-void SurfaceFactory::WillDrawSurface(SurfaceId id,
+void SurfaceFactory::WillDrawSurface(const SurfaceId& id,
                                      const gfx::Rect& damage_rect) {
   client_->WillDrawSurface(id, damage_rect);
 }
 
 void SurfaceFactory::ReceiveFromChild(
     const TransferableResourceArray& resources) {
   holder_.ReceiveFromChild(resources);
 }
 
 void SurfaceFactory::RefResources(const TransferableResourceArray& resources) {
   holder_.RefResources(resources);
 }
 
 void SurfaceFactory::UnrefResources(const ReturnedResourceArray& resources) {
   holder_.UnrefResources(resources);
 }
 
 }  // namespace cc