EME: Remove the concept of a parent key system.

components/cdm/renderer/widevine_key_systems.cc

 // 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.
 
 #include "components/cdm/renderer/widevine_key_systems.h"
 
 #include <stddef.h>
 
 #include <string>
 #include <vector>
 
 #include "base/logging.h"
 #include "build/build_config.h"
 #include "media/base/eme_constants.h"
 
 #include "widevine_cdm_version.h"  // In SHARED_INTERMEDIATE_DIR.
 
 #if defined(WIDEVINE_CDM_AVAILABLE)
 
 using media::KeySystemInfo;
 using media::SupportedCodecs;
 
 namespace cdm {
 
-// Return |name|'s parent key system.
-static std::string GetDirectParentName(const std::string& name) {
-  size_t last_period = name.find_last_of('.');
-  DCHECK_GT(last_period, 0u);
-  return name.substr(0u, last_period);
-}
-
 void AddWidevineWithCodecs(
     WidevineCdmType widevine_cdm_type,
     SupportedCodecs supported_codecs,
 #if defined(OS_ANDROID)
     SupportedCodecs supported_secure_codecs,
 #endif  // defined(OS_ANDROID)
     media::EmeRobustness max_audio_robustness,
     media::EmeRobustness max_video_robustness,
     media::EmeSessionTypeSupport persistent_license_support,
     media::EmeSessionTypeSupport persistent_release_message_support,
     media::EmeFeatureSupport persistent_state_support,
     media::EmeFeatureSupport distinctive_identifier_support,
     std::vector<KeySystemInfo>* concrete_key_systems) {
   KeySystemInfo info;
   info.key_system = kWidevineKeySystem;
 
   switch (widevine_cdm_type) {
     case WIDEVINE:
-      // For standard Widevine, add parent name.
-      info.parent_key_system = GetDirectParentName(kWidevineKeySystem);
       break;
 #if defined(OS_ANDROID)
     case WIDEVINE_HR_NON_COMPOSITING:
       info.key_system.append(".hrnoncompositing");
       break;
 #endif  // defined(OS_ANDROID)
     default:
       NOTREACHED();
   }
 
@@ skipping 25 matching lines @@
 #if defined(ENABLE_PEPPER_CDMS)
   info.pepper_type = kWidevineCdmPluginMimeType;
 #endif  // defined(ENABLE_PEPPER_CDMS)
 
   concrete_key_systems->push_back(info);
 }
 
 }  // namespace cdm
 
 #endif  // defined(WIDEVINE_CDM_AVAILABLE)