Removed calls to RefPtr::Release in return statements with auto move.

third_party/WebKit/Source/modules/credentialmanager/PasswordCredential.cpp

 // 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 "modules/credentialmanager/PasswordCredential.h"
 
 #include "bindings/core/v8/Dictionary.h"
 #include "bindings/core/v8/ExceptionState.h"
 #include "core/HTMLNames.h"
 #include "core/dom/ExecutionContext.h"
@@ skipping 161 matching lines @@
       else
         form_data->append(name, form_data->Decode(entry->Value()));
     }
   }
   form_data->append(idName(), id());
   form_data->append(passwordName(), password());
 
   RefPtr<EncodedFormData> encoded_data = form_data->EncodeMultiPartFormData();
   content_type = AtomicString("multipart/form-data; boundary=") +
                  encoded_data->Boundary().data();
-  return encoded_data.Release();
+  return encoded_data;
 }
 
 DEFINE_TRACE(PasswordCredential) {
   CredentialUserData::Trace(visitor);
   visitor->Trace(additional_data_);
 }
 
 }  // namespace blink