Add |legacy_destination_url| back to SessionMessage for EME

media/cdm/ppapi/external_clear_key/clear_key_cdm.cc

Index: media/cdm/ppapi/external_clear_key/clear_key_cdm.cc
diff --git a/media/cdm/ppapi/external_clear_key/clear_key_cdm.cc b/media/cdm/ppapi/external_clear_key/clear_key_cdm.cc
index 48b0bb063c0b72a3ad1fea7783486922d3b5b0d0..c06c76ad3098af37415a99f41fd7101131bf6013 100644
--- a/media/cdm/ppapi/external_clear_key/clear_key_cdm.cc
+++ b/media/cdm/ppapi/external_clear_key/clear_key_cdm.cc
@@ -671,7 +671,8 @@ void ClearKeyCdm::LoadLoadableSession() {
 
 void ClearKeyCdm::OnSessionMessage(const std::string& web_session_id,
                                    MediaKeys::MessageType message_type,
-                                   const std::vector<uint8>& message) {
+                                   const std::vector<uint8>& message,
+                                   const GURL& legacy_destination_url) {
   DVLOG(1) << "OnSessionMessage: " << message.size();
 
   // Ignore the message when we are waiting to update the loadable session.
@@ -682,13 +683,11 @@ void ClearKeyCdm::OnSessionMessage(const std::string& web_session_id,
   // involved (OnSessionCreated() called to resolve the CreateSession()
   // promise).
   // TODO(jrummell): Pass |message_type| on when this class is updated
-  // to Host_7. For now, pass NULL as the |destination_url| since we have
-  // no idea what it should be.
-  host_->OnSessionMessage(web_session_id.data(),
-                          web_session_id.length(),
+  // to Host_7.
+  host_->OnSessionMessage(web_session_id.data(), web_session_id.length(),
                           reinterpret_cast<const char*>(message.data()),
-                          message.size(),
-                          nullptr, 0);
+                          message.size(), legacy_destination_url.spec().data(),
+                          legacy_destination_url.spec().size());
 }
 
 void ClearKeyCdm::OnSessionKeysChange(const std::string& web_session_id,