[cast_channel] Move cast_channel related files from //extensions to //components

components/cast_channel/cast_socket_service.cc

 // Copyright 2017 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 "extensions/browser/api/cast_channel/cast_socket_service.h"
+#include "components/cast_channel/cast_socket_service.h"
 
 #include "base/memory/ptr_util.h"
 
-namespace extensions {
-namespace api {
 namespace cast_channel {
 
 int CastSocketRegistry::last_channel_id_ = 0;
 
 CastSocketRegistry::CastSocketRegistry() = default;
 
 CastSocketRegistry::~CastSocketRegistry() {
   DCHECK_CALLED_ON_VALID_THREAD(thread_checker_);
 }
 
 int CastSocketRegistry::AddSocket(std::unique_ptr<CastSocket> socket) {
   DCHECK_CALLED_ON_VALID_THREAD(thread_checker_);
   DCHECK(socket);
   int id = ++last_channel_id_;
   socket->set_id(id);
   sockets_.insert(std::make_pair(id, std::move(socket)));
   return id;
 }
 
-std::unique_ptr<CastSocket> CastSocketRegistry::RemoveSocket(int channel_id) {
+std::unique_ptr<::cast_channel::CastSocket> CastSocketRegistry::RemoveSocket(
+    int channel_id) {
   DCHECK_CALLED_ON_VALID_THREAD(thread_checker_);
   DCHECK(channel_id > 0);
   auto socket_it = sockets_.find(channel_id);
 
   std::unique_ptr<CastSocket> socket;
   if (socket_it != sockets_.end()) {
     socket = std::move(socket_it->second);
     sockets_.erase(socket_it);
   }
   return socket;
 }
 
-CastSocket* CastSocketRegistry::GetSocket(int channel_id) const {
+::cast_channel::CastSocket* CastSocketRegistry::GetSocket(
+    int channel_id) const {
   DCHECK_CALLED_ON_VALID_THREAD(thread_checker_);
   DCHECK(channel_id > 0);
   const auto& socket_it = sockets_.find(channel_id);
   return socket_it == sockets_.end() ? nullptr : socket_it->second.get();
 }
 
 CastSocketService::CastSocketService() = default;
 CastSocketService::~CastSocketService() = default;
 
 CastSocketRegistry* CastSocketService::GetOrCreateSocketRegistry() {
   DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
   if (!sockets_)
     sockets_.reset(new CastSocketRegistry());
   return sockets_.get();
 }
 
 }  // namespace cast_channel
-}  // namespace api
-}  // namespace extensions