media: Verify CDM Host files

media/cdm/cdm_paths.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 MEDIA_CDM_CDM_PATHS_H_
 #define MEDIA_CDM_CDM_PATHS_H_
 
 #include <string>
 
 #include "base/files/file_path.h"
 
 namespace media {
 
 // Name of the ClearKey CDM library.
 extern const char kClearKeyCdmLibraryName[];
 
+// Platform-specific filename relative to kClearKeyCdmBaseDirectory.
+extern const char kClearKeyCdmAdapterFileName[];
+
 // Returns the path of a CDM relative to DIR_COMPONENTS.
 // On platforms where a platform specific path is used, returns
 //   |cdm_base_path|/_platform_specific/<platform>_<arch>
 //   e.g. WidevineCdm/_platform_specific/win_x64
 // Otherwise, returns an empty path.
 // TODO(xhwang): Use this function in Widevine CDM component installer.
 base::FilePath GetPlatformSpecificDirectory(const std::string& cdm_base_path);
 
 }  // namespace media
 
 #endif  // MEDIA_CDM_CDM_PATHS_H_