make SetReceiveBufferSize and SetSendBufferSize return net error codes (instead of bools)

jingle/glue/channel_socket_adapter.cc

 // Copyright (c) 2012 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 "jingle/glue/channel_socket_adapter.h"
 
 #include <limits>
 
 #include "base/callback.h"
 #include "base/logging.h"
@@ skipping 81 matching lines @@
     // Channel is not writable yet.
     result = net::ERR_IO_PENDING;
     write_callback_ = callback;
     write_buffer_ = buffer;
     write_buffer_size_ = buffer_size;
   }
 
   return result;
 }
 
-bool TransportChannelSocketAdapter::SetReceiveBufferSize(int32 size) {
+int TransportChannelSocketAdapter::SetReceiveBufferSize(int32 size) {
   DCHECK_EQ(base::MessageLoop::current(), message_loop_);
-  return channel_->SetOption(talk_base::Socket::OPT_RCVBUF, size) == 0;
+  return (channel_->SetOption(talk_base::Socket::OPT_RCVBUF, size) == 0) ?
+      net::OK : net::ERR_SOCKET_SET_RECEIVE_BUFFER_SIZE_ERROR;
 }
 
-bool TransportChannelSocketAdapter::SetSendBufferSize(int32 size) {
+int TransportChannelSocketAdapter::SetSendBufferSize(int32 size) {
   DCHECK_EQ(base::MessageLoop::current(), message_loop_);
-  return channel_->SetOption(talk_base::Socket::OPT_SNDBUF, size) == 0;
+  return (channel_->SetOption(talk_base::Socket::OPT_SNDBUF, size) == 0) ?
+      net::OK : net::ERR_SOCKET_SET_SEND_BUFFER_SIZE_ERROR;
 }
 
 void TransportChannelSocketAdapter::Close(int error_code) {
   DCHECK_EQ(base::MessageLoop::current(), message_loop_);
 
   if (!channel_)  // Already closed.
     return;
 
   DCHECK(error_code != net::OK);
   closed_error_code_ = error_code;
@@ skipping 69 matching lines @@
 }
 
 void TransportChannelSocketAdapter::OnChannelDestroyed(
     cricket::TransportChannel* channel) {
   DCHECK_EQ(base::MessageLoop::current(), message_loop_);
   DCHECK_EQ(channel, channel_);
   Close(net::ERR_CONNECTION_ABORTED);
 }
 
 }  // namespace jingle_glue