Implement checks for distinctiveIdentifier and persistentState in requestMediaKeySystemAccess().

chrome/renderer/media/chrome_key_systems.cc

Index: chrome/renderer/media/chrome_key_systems.cc
diff --git a/chrome/renderer/media/chrome_key_systems.cc b/chrome/renderer/media/chrome_key_systems.cc
index db388eacf9e9486919a00ec3dba99be53e3cd5ac..f47294667209278d6120f8cfbe7c43d56b36740e 100644
--- a/chrome/renderer/media/chrome_key_systems.cc
+++ b/chrome/renderer/media/chrome_key_systems.cc
@@ -81,6 +81,12 @@ static void AddExternalClearKey(
   info.supported_init_data_types |= media::EME_INIT_DATA_TYPE_CENC;
 #endif  // defined(USE_PROPRIETARY_CODECS)
 
+  // Persistent sessions are faked.
+  info.persistent_state_requirement = media::EME_REQUIREMENT_OPTIONAL;
+  info.distinctive_identifier_requirement = media::EME_REQUIREMENT_NOT_ALLOWED;
+  info.supported_session_types = media::EME_SESSION_TYPE_TEMPORARY |
+                                 media::EME_SESSION_TYPE_PERSISTENT_LICENSE;
+
   info.pepper_type = kExternalClearKeyPepperType;
 
   concrete_key_systems->push_back(info);