Set listener task runner before connect channel.

content/child/child_thread_impl.h

 // 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.
 
 #ifndef CONTENT_CHILD_CHILD_THREAD_IMPL_H_
 #define CONTENT_CHILD_CHILD_THREAD_IMPL_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 292 matching lines @@
 
 struct ChildThreadImpl::Options {
   ~Options();
 
   class Builder;
 
   std::string channel_name;
   bool use_mojo_channel;
   scoped_refptr<base::SequencedTaskRunner> browser_process_io_runner;
   std::vector<IPC::MessageFilter*> startup_filters;
+  scoped_refptr<base::SingleThreadTaskRunner> listener_task_runner;
 
  private:
   Options();
 };
 
 class ChildThreadImpl::Options::Builder {
  public:
   Builder();
 
   Builder& InBrowserProcess(const InProcessChildThreadParams& params);
   Builder& UseMojoChannel(bool use_mojo_channel);
   Builder& WithChannelName(const std::string& channel_name);
   Builder& AddStartupFilter(IPC::MessageFilter* filter);
+  Builder& ListenerTaskRunner(
+      scoped_refptr<base::SingleThreadTaskRunner> task_runner);
 
   Options Build();
 
  private:
   struct Options options_;
 
   DISALLOW_COPY_AND_ASSIGN(Builder);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_CHILD_THREAD_IMPL_H_