Refactor ChildProcess and related classes to create a framework outside of br...

chrome/common/child_thread.h

 // Copyright (c) 2009 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 CHROME_COMMON_CHILD_THREAD_H_
 #define CHROME_COMMON_CHILD_THREAD_H_
 
 #include "base/basictypes.h"
 #include "base/scoped_ptr.h"
-#include "chrome/common/message_router.h"
+#include "base/mp/mp_child_thread.h"
+#include "chrome/common/notification_service.h"
 #include "chrome/common/resource_dispatcher.h"
-#include "ipc/ipc_sync_channel.h"
-#include "ipc/ipc_message.h"
+#include "chrome/common/socket_stream_dispatcher.h"
 
-class NotificationService;
-class SocketStreamDispatcher;
-
-namespace IPC {
-class SyncMessageFilter;
-}
 
 // The main thread of a child process derives from this class.
-class ChildThread : public IPC::Channel::Listener,
-                    public IPC::Message::Sender {
+class ChildThread : public base::MpChildThread {
  public:
   // Creates the thread.
   ChildThread();
   // Used for single-process mode.
   explicit ChildThread(const std::string& channel_name);
   virtual ~ChildThread();
 
-  // IPC::Message::Sender implementation:
-  virtual bool Send(IPC::Message* msg);
-
-  // See documentation on MessageRouter for AddRoute and RemoveRoute
-  void AddRoute(int32 routing_id, IPC::Channel::Listener* listener);
-  void RemoveRoute(int32 routing_id);
-
-  IPC::Channel::Listener* ResolveRoute(int32 routing_id);
-
   // Creates a ResourceLoaderBridge.
   // Tests can override this method if they want a custom loading behavior.
   virtual webkit_glue::ResourceLoaderBridge* CreateBridge(
       const webkit_glue::ResourceLoaderBridge::RequestInfo& request_info,
       int host_renderer_id,
       int host_render_view_id);
 
   ResourceDispatcher* resource_dispatcher() {
     return resource_dispatcher_.get();
   }
 
   SocketStreamDispatcher* socket_stream_dispatcher() {
     return socket_stream_dispatcher_.get();
   }
 
-  // Safe to call on any thread, as long as it's guaranteed that the thread's
-  // lifetime is less than the main thread.
-  IPC::SyncMessageFilter* sync_message_filter() { return sync_message_filter_; }
-
-  MessageLoop* message_loop() { return message_loop_; }
-
-  // Returns the one child thread.
-  static ChildThread* current();
-
- protected:
-  friend class ChildProcess;
-
-  // Called when the process refcount is 0.
-  void OnProcessFinalRelease();
-
-  virtual void OnControlMessageReceived(const IPC::Message& msg) { }
-  virtual void OnAskBeforeShutdown();
-  virtual void OnShutdown();
-
-#ifdef IPC_MESSAGE_LOG_ENABLED
-  virtual void OnSetIPCLoggingEnabled(bool enable);
-#endif
-
-  IPC::SyncChannel* channel() { return channel_.get(); }
-
-  void set_on_channel_error_called(bool on_channel_error_called) {
-    on_channel_error_called_ = on_channel_error_called;
-  }
-
  private:
   void Init();
 
   // IPC::Channel::Listener implementation:
   virtual void OnMessageReceived(const IPC::Message& msg);
-  virtual void OnChannelError();
-
-  std::string channel_name_;
-  scoped_ptr<IPC::SyncChannel> channel_;
-
-  // Allows threads other than the main thread to send sync messages.
-  scoped_refptr<IPC::SyncMessageFilter> sync_message_filter_;
-
-  // Implements message routing functionality to the consumers of ChildThread.
-  MessageRouter router_;
 
   // Handles resource loads for this process.
   scoped_ptr<ResourceDispatcher> resource_dispatcher_;
 
   // Handles SocketStream for this process.
   scoped_ptr<SocketStreamDispatcher> socket_stream_dispatcher_;
 
-  // If true, checks with the browser process before shutdown.  This avoids race
-  // conditions if the process refcount is 0 but there's an IPC message inflight
-  // that would addref it.
-  bool check_with_browser_before_shutdown_;
-
-  // The OnChannelError() callback was invoked - the channel is dead, don't
-  // attempt to communicate.
-  bool on_channel_error_called_;
-
-  MessageLoop* message_loop_;
-
   scoped_ptr<NotificationService> notification_service_;
 
   DISALLOW_COPY_AND_ASSIGN(ChildThread);
 };
 
 #endif  // CHROME_COMMON_CHILD_THREAD_H_