media: Rename CdmService to CdmRegistry

content/browser/media/cdm_service_impl.h

-// Copyright 2016 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 CONTENT_BROWSER_MEDIA_CDM_SERVICE_IMPL_H_
-#define CONTENT_BROWSER_MEDIA_CDM_SERVICE_IMPL_H_
-
-#include <vector>
-
-#include "base/lazy_instance.h"
-#include "base/macros.h"
-#include "content/common/content_export.h"
-#include "content/public/browser/cdm_service.h"
-
-namespace content {
-
-struct CdmInfo;
-
-class CONTENT_EXPORT CdmServiceImpl : NON_EXPORTED_BASE(public CdmService) {
- public:
-  // Returns the CdmServiceImpl singleton.
-  static CdmServiceImpl* GetInstance();
-
-  // CdmService implementation.
-  void Init() override;
-  void RegisterCdm(const CdmInfo& info) override;
-  const std::vector<CdmInfo>& GetAllRegisteredCdms() override;
-
- private:
-  friend struct base::DefaultLazyInstanceTraits<CdmServiceImpl>;
-  friend class CdmServiceImplTest;
-
-  CdmServiceImpl();
-  ~CdmServiceImpl() override;
-
-  std::vector<CdmInfo> cdms_;
-
-  DISALLOW_COPY_AND_ASSIGN(CdmServiceImpl);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_MEDIA_CDM_SERVICE_IMPL_H_