Convert NaCl renderer-loader messages to mojo.

components/nacl/loader/nacl_trusted_listener.h

Index: components/nacl/loader/nacl_trusted_listener.h
diff --git a/components/nacl/loader/nacl_trusted_listener.h b/components/nacl/loader/nacl_trusted_listener.h
index a368ab5b3331ca68ee1827f2807f2a122ec365a4..f6166ca7dda108ede02a20c93f74c0434e8d7640 100644
--- a/components/nacl/loader/nacl_trusted_listener.h
+++ b/components/nacl/loader/nacl_trusted_listener.h
@@ -6,32 +6,22 @@
 #define COMPONENTS_NACL_LOADER_NACL_TRUSTED_LISTENER_H_
 
 #include "base/macros.h"
-#include "base/memory/ref_counted.h"
-#include "ipc/ipc_channel_handle.h"
-#include "ipc/ipc_listener.h"
-#include "ipc/ipc_sync_channel.h"
+#include "components/nacl/common/nacl.mojom.h"
 
 namespace base {
 class SingleThreadTaskRunner;
 }
 
-class NaClTrustedListener : public base::RefCounted<NaClTrustedListener>,
-                            public IPC::Listener {
+class NaClTrustedListener {
  public:
-  NaClTrustedListener(const IPC::ChannelHandle& handle,
-                      base::SingleThreadTaskRunner* ipc_task_runner,
-                      base::WaitableEvent* shutdown_event);
+  NaClTrustedListener(nacl::mojom::NaClRendererHostPtr renderer_host,
+                      base::SingleThreadTaskRunner* io_task_runner);
+  ~NaClTrustedListener();
 
-  // Listener implementation.
-  bool OnMessageReceived(const IPC::Message& message) override;
-
-  bool Send(IPC::Message* msg);
+  nacl::mojom::NaClRendererHost& renderer_host() { return *renderer_host_; }

[Mark Seaborn, 2016/12/19 19:00:36]

Is there a reason why this is a reference?  I thought non-const references are
against the Chromium style.  Can you make it a pointer instead, please?

[Sam McNally, 2016/12/19 23:12:12]

They're only banned as function parameters. Changed it anyway.

 
  private:
-  friend class base::RefCounted<NaClTrustedListener>;
-  ~NaClTrustedListener() override;
-  IPC::ChannelHandle channel_handle_;
-  std::unique_ptr<IPC::SyncChannel> channel_;
+  nacl::mojom::NaClRendererHostPtr renderer_host_;
 
   DISALLOW_COPY_AND_ASSIGN(NaClTrustedListener);
 };