Convert JsonWriter::Write to taking a const ref for the in-param

remoting/host/setup/me2me_native_messaging_host_unittest.cc

 // Copyright 2013 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 "remoting/host/setup/me2me_native_messaging_host.h"
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/json/json_reader.h"
 #include "base/json/json_writer.h"
@@ skipping 391 matching lines @@
     return nullptr;
   }
 
   return make_scoped_ptr(
       static_cast<base::DictionaryValue*>(message.release()));
 }
 
 void Me2MeNativeMessagingHostTest::WriteMessageToInputPipe(
     const base::Value& message) {
   std::string message_json;
-  base::JSONWriter::Write(&message, &message_json);
+  base::JSONWriter::Write(message, &message_json);
 
   uint32 length = message_json.length();
   input_write_file_.WriteAtCurrentPos(reinterpret_cast<char*>(&length),
                                       sizeof(length));
   input_write_file_.WriteAtCurrentPos(message_json.data(), length);
 }
 
 void Me2MeNativeMessagingHostTest::TestBadRequest(const base::Value& message) {
   base::DictionaryValue good_message;
   good_message.SetString("type", "hello");
@@ skipping 186 matching lines @@
 }
 
 // Verify rejection if getCredentialsFromAuthCode has no auth code.
 TEST_F(Me2MeNativeMessagingHostTest, GetCredentialsFromAuthCodeNoAuthCode) {
   base::DictionaryValue message;
   message.SetString("type", "getCredentialsFromAuthCode");
   TestBadRequest(message);
 }
 
 }  // namespace remoting