media: Remove BrowserCdmFactory inferface.

media/base/android/browser_cdm_factory_android.h

-// 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.
-
-#ifndef MEDIA_BASE_BROWSER_CDM_FACTORY_ANDROID_H_
-#define MEDIA_BASE_BROWSER_CDM_FACTORY_ANDROID_H_
-
-#include "base/macros.h"
-#include "media/base/browser_cdm_factory.h"
-#include "media/base/media_export.h"
-
-namespace media {
-
-class MEDIA_EXPORT BrowserCdmFactoryAndroid : public BrowserCdmFactory {
- public:
-  BrowserCdmFactoryAndroid() {}
-  ~BrowserCdmFactoryAndroid() final {};
-
-  scoped_refptr<MediaKeys> CreateBrowserCdm(
-      const std::string& key_system,
-      bool use_hw_secure_codecs,
-      const SessionMessageCB& session_message_cb,
-      const SessionClosedCB& session_closed_cb,
-      const LegacySessionErrorCB& legacy_session_error_cb,
-      const SessionKeysChangeCB& session_keys_change_cb,
-      const SessionExpirationUpdateCB& session_expiration_update_cb) final;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(BrowserCdmFactoryAndroid);
-};
-
-}  // namespace media
-
-#endif  // MEDIA_BASE_BROWSER_CDM_FACTORY_ANDROID_H_