Refactoring: Split NaClListener into two delegated classes.

components/nacl/loader/listener_delegate.h

+// 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.
+
+#ifndef COMPONENTS_NACL_LOADER_LISTENER_DELEGATE_H_
+#define COMPONENTS_NACL_LOADER_LISTENER_DELEGATE_H_
+
+#include "base/memory/ref_counted.h"
+#include "ipc/ipc_channel_handle.h"
+
+namespace base {
+class MessageLoopProxy;
+}  // namespace base
+
+namespace IPC {
+class Sender;
+}  // namespace IPC
+
+namespace nacl {
+
+struct NaClStartParams;
+
+class ListenerDelegate {
+ public:
+  virtual ~ListenerDelegate() {}
+
+  // Called when the plugin start message is received from the browser process.
+  virtual void Start(const NaClStartParams& params,
+                     scoped_refptr<base::MessageLoopProxy> io_loop_proxy,
+                     IPC::ChannelHandle trusted_channel_handle,
+                     IPC::Sender* sender) = 0;
+};
+
+}  // namespace nacl
+
+#endif  // COMPONENTS_NACL_LOADER_LISTENER_DELEGATE_H_