Add CdmService to keep track of CDMs

third_party/widevine/cdm/widevine_cdm_common.h

 // Copyright (c) 2012 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 WIDEVINE_CDM_WIDEVINE_CDM_COMMON_H_
 #define WIDEVINE_CDM_WIDEVINE_CDM_COMMON_H_
 
 // This file defines constants common to all Widevine CDM versions.
 
 // Widevine CDM version contains 4 components, e.g. 1.4.0.195.
 const int kWidevineCdmVersionNumComponents = 4;
 
 // "alpha" is a temporary name until a convention is defined.
 const char kWidevineKeySystem[] = "com.widevine.alpha";
 
+// This type is used to register the Widevine CDM.
+const char kWidevineCdmType[] = "Widevine";
+
 // This name is used by UMA. Do not change it!
 const char kWidevineKeySystemNameForUMA[] = "Widevine";
 
 const char kWidevineCdmDisplayName[] = "Widevine Content Decryption Module";
 
 // Will be parsed as HTML.
 const char kWidevineCdmDescription[] =
     "Enables Widevine licenses for playback of HTML audio/video content.";
 
 #if defined(ENABLE_PEPPER_CDMS)
@@ skipping 31 matching lines @@
 const char kCdmSupportedCodecAvc1[] = "avc1";
 #endif  // defined(USE_PROPRIETARY_CODECS)
 
 #if defined(OS_MACOSX) || defined(OS_WIN)
 // CDM is installed by the component installer instead of the Chrome installer.
 #define WIDEVINE_CDM_IS_COMPONENT
 #endif  // defined(OS_MACOSX) || defined(OS_WIN)
 #endif  // defined(ENABLE_PEPPER_CDMS)
 
 #endif  // WIDEVINE_CDM_WIDEVINE_CDM_COMMON_H_