BrowserCdmManager: Do not pass MIME types as init_data_type.

content/renderer/media/crypto/proxy_media_keys.cc

Index: content/renderer/media/crypto/proxy_media_keys.cc
diff --git a/content/renderer/media/crypto/proxy_media_keys.cc b/content/renderer/media/crypto/proxy_media_keys.cc
index fca2757f85bf0973a138c2e5bb48869eb6085c25..fd6626ffec0a8d5a2ba5c78004a78926cf0fab16 100644
--- a/content/renderer/media/crypto/proxy_media_keys.cc
+++ b/content/renderer/media/crypto/proxy_media_keys.cc
@@ -66,9 +66,9 @@ void ProxyMediaKeys::CreateSessionAndGenerateRequest(
   // See http://crbug.com/342510
   CdmHostMsg_CreateSession_InitDataType create_session_init_data_type;
   if (init_data_type == "cenc") {
-    create_session_init_data_type = CREATE_SESSION_TYPE_MP4;
+    create_session_init_data_type = INIT_DATA_TYPE_CENC;
   } else if (init_data_type == "webm") {
-    create_session_init_data_type = CREATE_SESSION_TYPE_WEBM;
+    create_session_init_data_type = INIT_DATA_TYPE_WEBM;
   } else {
     DLOG(ERROR) << "Unsupported EME CreateSession content type of "
                 << init_data_type;