Support using a Mojo message pipe in a ChannelHandle.

ipc/ipc_channel_factory.cc

 // Copyright 2014 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 "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "ipc/ipc_channel_factory.h"
+#include "ipc/ipc_channel_mojo.h"
 
 namespace IPC {
 
 namespace {
 
 class PlatformChannelFactory : public ChannelFactory {
  public:
   PlatformChannelFactory(ChannelHandle handle, Channel::Mode mode)
       : handle_(handle), mode_(mode) {}
 
   std::string GetName() const override {
     return handle_.name;
   }
 
   std::unique_ptr<Channel> BuildChannel(Listener* listener) override {
+    if (handle_.mojo_handle.is_valid()) {
+      return ChannelMojo::Create(
+          mojo::ScopedMessagePipeHandle(handle_.mojo_handle), mode_, listener);
+    }
     return Channel::Create(handle_, mode_, listener);
   }
 
  private:
   ChannelHandle handle_;
   Channel::Mode mode_;
 
   DISALLOW_COPY_AND_ASSIGN(PlatformChannelFactory);
 };
 
 } // namespace
 
 // static
 std::unique_ptr<ChannelFactory> ChannelFactory::Create(
     const ChannelHandle& handle,
     Channel::Mode mode) {
   return base::WrapUnique(new PlatformChannelFactory(handle, mode));
 }
 
 }  // namespace IPC