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

extensions/browser/api/cast_channel/cast_socket_service_factory.h

-// 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.
-
-#ifndef EXTENSIONS_BROWSER_API_CAST_CHANNEL_CAST_CHANNEL_SERVICE_FACTORY_H_
-#define EXTENSIONS_BROWSER_API_CAST_CHANNEL_CAST_CHANNEL_SERVICE_FACTORY_H_
-
-#include "base/lazy_instance.h"
-#include "base/macros.h"
-#include "components/keyed_service/content/browser_context_keyed_service_factory.h"
-
-namespace extensions {
-namespace api {
-namespace cast_channel {
-
-class CastSocketService;
-
-// TODO(crbug.com/725717): CastSocket created by one profile (browser context)
-// could be shared with other profiles.
-class CastSocketServiceFactory : public BrowserContextKeyedServiceFactory {
- public:
-  // Caller needs to make sure that it passes in the same |context| instance to
-  // this function for both normal profile and incognito profile.
-  static CastSocketService* GetForBrowserContext(
-      content::BrowserContext* context);
-
-  static CastSocketServiceFactory* GetInstance();
-
- private:
-  friend struct base::LazyInstanceTraitsBase<CastSocketServiceFactory>;
-
-  CastSocketServiceFactory();
-  ~CastSocketServiceFactory() override;
-
-  // BrowserContextKeyedServiceFactory interface.
-  content::BrowserContext* GetBrowserContextToUse(
-      content::BrowserContext* context) const override;
-
-  KeyedService* BuildServiceInstanceFor(
-      content::BrowserContext* context) const override;
-
-  DISALLOW_COPY_AND_ASSIGN(CastSocketServiceFactory);
-};
-
-}  // namespace cast_channel
-}  // namespace api
-}  // namespace extensions
-
-#endif  // EXTENSIONS_BROWSER_API_CAST_CHANNEL_CAST_CHANNEL_SERVICE_FACTORY_H_