Use ChannelMojo from the browser to NaCl loader process.

components/nacl/broker/nacl_broker_listener.h

Index: components/nacl/broker/nacl_broker_listener.h
diff --git a/components/nacl/broker/nacl_broker_listener.h b/components/nacl/broker/nacl_broker_listener.h
index 920fb0ad174d5a03520a15a6d2302f2a37e749d3..ad192519817078a12ec5eb40ec6e050408f32b7f 100644
--- a/components/nacl/broker/nacl_broker_listener.h
+++ b/components/nacl/broker/nacl_broker_listener.h
@@ -19,6 +19,12 @@ namespace IPC {
 class Channel;
 }
 
+namespace mojo {
+namespace edk {
+class ScopedIPCSupport;
+}  // namespace edk
+}  // namespace mojo
+
 // The BrokerThread class represents the thread that handles the messages from
 // the browser process and starts NaCl loader processes.
 class NaClBrokerListener : public content::SandboxedProcessLauncherDelegate,
@@ -46,6 +52,7 @@ class NaClBrokerListener : public content::SandboxedProcessLauncherDelegate,
 
   base::Process browser_process_;
   std::unique_ptr<IPC::Channel> channel_;
+  std::unique_ptr<mojo::edk::ScopedIPCSupport> mojo_ipc_support_;
 
   DISALLOW_COPY_AND_ASSIGN(NaClBrokerListener);
 };