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

chrome/common/child_process.h

-// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Copyright (c) 2010 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_PROCESS_H__
 #define CHROME_COMMON_CHILD_PROCESS_H__
 
 #include "base/basictypes.h"
-#include "base/scoped_ptr.h"
-#include "base/thread.h"
-#include "base/waitable_event.h"
-#include "chrome/common/child_thread.h"
+#include "base/mp/mp_child_process.h"
 
 // Base class for child processes of the browser process (i.e. renderer and
 // plugin host). This is a singleton object for each child process.
-class ChildProcess {
+class ChildProcess : public base::MpChildProcess {
  public:
   // Child processes should have an object that derives from this class.
   ChildProcess();
   virtual ~ChildProcess();
 
-  // Getter for the child process' main thread.
-  ChildThread* main_thread() { return main_thread_.get(); }
-  void set_main_thread(ChildThread* thread) { main_thread_.reset(thread); }
-
-  MessageLoop* io_message_loop() { return io_thread_.message_loop(); }
-
-  // A global event object that is signalled when the main thread's message
-  // loop exits.  This gives background threads a way to observe the main
-  // thread shutting down.  This can be useful when a background thread is
-  // waiting for some information from the browser process.  If the browser
-  // process goes away prematurely, the background thread can at least notice
-  // the child processes's main thread exiting to determine that it should give
-  // up waiting.
-  // For example, see the renderer code used to implement
-  // webkit_glue::GetCookies.
-  base::WaitableEvent* GetShutDownEvent();
-
-  // These are used for ref-counting the child process.  The process shuts
-  // itself down when the ref count reaches 0.
-  // For example, in the renderer process, generally each tab managed by this
-  // process will hold a reference to the process, and release when closed.
-  void AddRefProcess();
-  void ReleaseProcess();
-
-  // Getter for the one ChildProcess object for this process.
-  static ChildProcess* current() { return child_process_; }
+  virtual base::Thread* GetIOThread(){ return &io_thread_; }
 
   static void WaitForDebugger(const std::wstring& label);
  private:
-  int ref_count_;
-
-  // An event that will be signalled when we shutdown.
-  base::WaitableEvent shutdown_event_;
 
   // The thread that handles IO events.
   base::Thread io_thread_;
 
-  // NOTE: make sure that main_thread_ is listed after shutdown_event_, since
-  // it depends on it (indirectly through IPC::SyncChannel).  Same for
-  // io_thread_.
-  scoped_ptr<ChildThread> main_thread_;
-
-  // The singleton instance for this process.
-  static ChildProcess* child_process_;
-
   DISALLOW_COPY_AND_ASSIGN(ChildProcess);
 };
 
 #endif  // CHROME_COMMON_CHILD_PROCESS_H__