It2Me native messaging: GYP and source refactoring

remoting/host/setup/native_messaging_channel.h

-// Copyright 2013 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 REMOTING_HOST_SETUP_NATIVE_MESSAGING_CHANNEL_H_
-#define REMOTING_HOST_SETUP_NATIVE_MESSAGING_CHANNEL_H_
-
-#include "base/callback.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/memory/weak_ptr.h"
-#include "base/platform_file.h"
-#include "base/threading/non_thread_safe.h"
-#include "remoting/host/setup/native_messaging_reader.h"
-#include "remoting/host/setup/native_messaging_writer.h"
-
-namespace base {
-class DictionaryValue;
-class Value;
-}  // namespace base
-
-namespace remoting {
-
-// Implements reading messages and sending responses across the native messaging
-// host pipe. Delegates processing of received messages to Delegate.
-//
-// TODO(alexeypa): Add ability to switch between different |delegate_| pointers
-// on the fly. This is useful for implementing UAC-style elevation on Windows -
-// an unprivileged delegate could be replaced with another delegate that
-// forwards messages to the elevated instance of the native messaging host.
-class NativeMessagingChannel : public base::NonThreadSafe {
- public:
-  // Used to sends a response back to the client app.
-  typedef base::Callback<void(scoped_ptr<base::DictionaryValue> response)>
-      SendResponseCallback;
-
-  class Delegate {
-   public:
-    virtual ~Delegate() {}
-
-    // Processes a message received from the client app. Invokes |done| to send
-    // a response back to the client app.
-    virtual void ProcessMessage(scoped_ptr<base::DictionaryValue> message,
-                                const SendResponseCallback& done) = 0;
-  };
-
-  // Constructs an object taking the ownership of |input| and |output|. Closes
-  // |input| and |output| to prevent the caller frmo using them.
-  NativeMessagingChannel(
-      scoped_ptr<Delegate> delegate,
-      base::PlatformFile input,
-      base::PlatformFile output);
-  ~NativeMessagingChannel();
-
-  // Starts reading and processing messages.
-  void Start(const base::Closure& quit_closure);
-
- private:
-  // Processes a message received from the client app.
-  void ProcessMessage(scoped_ptr<base::Value> message);
-
-  // Sends a response back to the client app.
-  void SendResponse(scoped_ptr<base::DictionaryValue> response);
-
-  // Initiates shutdown and runs |quit_closure| if there are no pending requests
-  // left.
-  void Shutdown();
-
-  base::Closure quit_closure_;
-
-  NativeMessagingReader native_messaging_reader_;
-  scoped_ptr<NativeMessagingWriter> native_messaging_writer_;
-
-  // |delegate_| may post tasks to this object during destruction (but not
-  // afterwards), so it needs to be destroyed before other members of this class
-  // (except for |weak_factory_|).
-  scoped_ptr<Delegate> delegate_;
-
-  // Keeps track of pending requests. Used to delay shutdown until all responses
-  // have been sent.
-  int pending_requests_;
-
-  // True if Shutdown() has been called.
-  bool shutdown_;
-
-  base::WeakPtr<NativeMessagingChannel> weak_ptr_;
-  base::WeakPtrFactory<NativeMessagingChannel> weak_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(NativeMessagingChannel);
-};
-
-}  // namespace remoting
-
-#endif  // REMOTING_HOST_SETUP_NATIVE_MESSAGING_CHANNEL_H_