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 feb5a25054a74c50a4280930140b542f84ffa5f2..4077f78fd6409db7b64391894d072c563874b037 100644
--- a/components/nacl/broker/nacl_broker_listener.h
+++ b/components/nacl/broker/nacl_broker_listener.h
@@ -20,6 +20,12 @@ 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,