media: Use native CDM enum types in media mojo interfaces

media/mojo/services/mojo_cdm_promise.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_promise.h"
 
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "media/base/decryptor.h"
 #include "media/base/media_keys.h"
 
 namespace media {
 
 static mojom::CdmPromiseResultPtr GetRejectResult(
     MediaKeys::Exception exception,
     uint32_t system_code,
     const std::string& error_message) {
   mojom::CdmPromiseResultPtr cdm_promise_result(mojom::CdmPromiseResult::New());
   cdm_promise_result->success = false;
-  cdm_promise_result->exception = static_cast<mojom::CdmException>(exception);
+  cdm_promise_result->exception = exception;
   cdm_promise_result->system_code = system_code;
   cdm_promise_result->error_message = error_message;
   return cdm_promise_result;
 }
 
 template <typename... T>
 MojoCdmPromise<T...>::MojoCdmPromise(const CallbackType& callback)
     : callback_(callback) {
   DCHECK(!callback_.is_null());
 }
@@ skipping 22 matching lines @@
                                   const std::string& error_message) {
   MarkPromiseSettled();
   callback_.Run(GetRejectResult(exception, system_code, error_message), T()...);
   callback_.Reset();
 }
 
 template class MojoCdmPromise<>;
 template class MojoCdmPromise<std::string>;
 
 }  // namespace media