Make BrowserMessageFilter support dispatching messages on different threads.

chrome/browser/browser_io_message_filter.cc

Index: chrome/browser/browser_io_message_filter.cc
===================================================================
--- chrome/browser/browser_io_message_filter.cc	(revision 68741)
+++ chrome/browser/browser_io_message_filter.cc	(working copy)
@@ -1,41 +0,0 @@
-// 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 "chrome/browser/browser_io_message_filter.h"
-
-#include "base/logging.h"
-#include "base/process_util.h"
-#include "chrome/browser/renderer_host/browser_render_process_host.h"
-
-BrowserIOMessageFilter::BrowserIOMessageFilter() : channel_(NULL) {
-}
-
-BrowserIOMessageFilter::~BrowserIOMessageFilter() {
-}
-
-void BrowserIOMessageFilter::OnFilterAdded(IPC::Channel* channel) {
-  channel_ = channel;
-}
-
-void BrowserIOMessageFilter::OnChannelClosing() {
-  channel_ = NULL;
-}
-
-void BrowserIOMessageFilter::OnChannelConnected(int32 peer_pid) {
-  if (!base::OpenProcessHandle(peer_pid, &peer_handle_)) {
-    NOTREACHED();
-  }
-}
-
-bool BrowserIOMessageFilter::Send(IPC::Message* msg) {
-  if (channel_)
-    return channel_->Send(msg);
-
-  delete msg;
-  return false;
-}
-
-void BrowserIOMessageFilter::BadMessageReceived(uint32 msg_type) {
-  BrowserRenderProcessHost::BadMessageTerminateProcess(msg_type, peer_handle());
-}