Revert of Revert of Mojo: Convert some scoped_ptr<...>(new ...) to make_scoped_ptr(new ...) in mojo/{embedder,system}.

mojo/system/raw_channel_posix.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 "mojo/system/raw_channel.h"
 
 #include <errno.h>
 #include <sys/uio.h>
 #include <unistd.h>
 
@@ skipping 461 matching lines @@
 }
 
 }  // namespace
 
 // -----------------------------------------------------------------------------
 
 // Static factory method declared in raw_channel.h.
 // static
 scoped_ptr<RawChannel> RawChannel::Create(
     embedder::ScopedPlatformHandle handle) {
-  return scoped_ptr<RawChannel>(new RawChannelPosix(handle.Pass()));
+  return make_scoped_ptr(new RawChannelPosix(handle.Pass()));
 }
 
 }  // namespace system
 }  // namespace mojo