Switch SurfaceId maps from base::hash_map to std::unordered_map.

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 "base/trace_event/trace_event.h"
 #include "cc/output/compositor_frame.h"
 #include "cc/output/copy_output_request.h"
 #include "cc/surfaces/surface.h"
@@ skipping 13 matching lines @@
 SurfaceFactory::~SurfaceFactory() {
   if (!surface_map_.empty()) {
     LOG(ERROR) << "SurfaceFactory has " << surface_map_.size()
                << " entries in map on destruction.";
   }
   DestroyAll();
   client_->SetBeginFrameSource(SurfaceId(), nullptr);
 }
 
 void SurfaceFactory::DestroyAll() {
   for (auto it = surface_map_.begin(); it != surface_map_.end(); ++it)

[danakj, 2016/01/26 23:53:32]

can you do this with a value forloop?

for (auto pair : surface_map_)
  manager->Destroy(pair.second);

[lfg, 2016/01/27 00:53:14]

Done.

-    manager_->Destroy(surface_map_.take(it));
+    manager_->Destroy(std::move(it->second));
   surface_map_.clear();
 }
 
 void SurfaceFactory::Create(SurfaceId surface_id) {
   scoped_ptr<Surface> surface(new Surface(surface_id, this));
   manager_->RegisterSurface(surface.get());
   DCHECK(!surface_map_.count(surface_id));
-  surface_map_.add(surface_id, std::move(surface));
+  surface_map_[surface_id] = std::move(surface);
 }
 
 void SurfaceFactory::Destroy(SurfaceId surface_id) {
   OwningSurfaceMap::iterator it = surface_map_.find(surface_id);
   DCHECK(it != surface_map_.end());
   DCHECK(it->second->factory().get() == this);
-  manager_->Destroy(surface_map_.take_and_erase(it));
+  scoped_ptr<Surface> surface(std::move(it->second));
+  surface_map_.erase(it);
+  manager_->Destroy(std::move(surface));
 }
 
 void SurfaceFactory::SetBeginFrameSource(SurfaceId surface_id,
                                          BeginFrameSource* begin_frame_source) {
   client_->SetBeginFrameSource(surface_id, begin_frame_source);
 }
 
 void SurfaceFactory::SubmitCompositorFrame(SurfaceId surface_id,
                                            scoped_ptr<CompositorFrame> frame,
                                            const DrawCallback& callback) {
@@ skipping 33 matching lines @@
 
 void SurfaceFactory::RefResources(const TransferableResourceArray& resources) {
   holder_.RefResources(resources);
 }
 
 void SurfaceFactory::UnrefResources(const ReturnedResourceArray& resources) {
   holder_.UnrefResources(resources);
 }
 
 }  // namespace cc