Copy the (early prototype of) remoting in Chrome into the public tree....

remoting/base/protocol_util.cc

+// Copyright (c) 2010 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/base/protocol_util.h"
+
+#include "base/basictypes.h"
+#include "base/hash_tables.h"
+#include "talk/base/byteorder.h"
+
+namespace remoting {
+
+scoped_refptr<media::DataBuffer> SerializeAndFrameMessage(
+    const google::protobuf::MessageLite& msg) {
+
+  // Create a buffer with 4 extra bytes. This is used as prefix to write an
+  // int32 of the serialized message size for framing.
+  const int kExtraBytes = sizeof(int32);
+  int size = msg.ByteSize() + kExtraBytes;
+  scoped_refptr<media::DataBuffer> buffer = new media::DataBuffer(size);
+  talk_base::SetBE32(buffer->GetWritableData(), msg.GetCachedSize());
+  msg.SerializeWithCachedSizesToArray(buffer->GetWritableData() + kExtraBytes);
+  buffer->SetDataSize(size);
+  return buffer;
+}
+
+}  // namespace remoting