Fix few compilation errors on Windows in media/ during Windows GN build.

media/mojo/services/mojo_cdm.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 "media/mojo/services/mojo_cdm.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "media/base/cdm_key_information.h"
 #include "media/base/cdm_promise.h"
@@ skipping 151 matching lines @@
   session_keys_change_cb_.Run(session_id, has_additional_usable_key,
                               key_data.Pass());
 }
 
 void MojoCdm::OnSessionExpirationUpdate(const mojo::String& session_id,
                                         int64_t new_expiry_time_usec) {
   session_expiration_update_cb_.Run(
       session_id, base::Time::FromInternalValue(new_expiry_time_usec));
 }
 
-template <typename... T>
-void MojoCdm::OnPromiseResult(scoped_ptr<CdmPromiseTemplate<T...>> promise,
-                              mojo::CdmPromiseResultPtr result,
-                              typename MojoTypeTrait<T>::MojoType... args) {
-  if (result->success)
-    promise->resolve(args.template To<T>()...);  // See ISO C++03 14.2/4.
-  else
-    RejectPromise(promise.Pass(), result.Pass());
-}
-
 }  // namespace media