Switch the first thread in a child process to be the main thread...

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 "base/thread.h"
 #include "chrome/common/message_router.h"
 #include "chrome/common/resource_dispatcher.h"
 #include "ipc/ipc_sync_channel.h"
 
-// Child processes's background thread should derive from this class.
+class NotificationService;
+
+// The main thread of a child process derives from this class.
 class ChildThread : public IPC::Channel::Listener,
-                    public IPC::Message::Sender,
-                    public base::Thread {
+                    public IPC::Message::Sender {
  public:
   // Creates the thread.
-  ChildThread(Thread::Options options);
+  ChildThread();
+  // Used for single-process mode.
+  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);
 
-  MessageLoop* owner_loop() { return owner_loop_; }
-
   ResourceDispatcher* resource_dispatcher() {
     return resource_dispatcher_.get();
   }
 
+  MessageLoop* message_loop() { return message_loop_; }
+
   // Returns the one child thread.
   static ChildThread* current();
 
  protected:
   friend class ChildProcess;
 
-  // Starts the thread.
-  bool Run();
-
-  // Overrides the channel name.  Used for --single-process mode.
-  void SetChannelName(const std::string& name) { channel_name_ = name; }
-
   // Called when the process refcount is 0.
   void OnProcessFinalRelease();
 
- protected:
-  // The required stack size if V8 runs on a thread.
-  static const size_t kV8StackSize;
-
   virtual void OnControlMessageReceived(const IPC::Message& msg) { }
 
   IPC::SyncChannel* channel() { return channel_.get(); }
 
-  // Thread implementation.
-  virtual void Init();
-  virtual void CleanUp();
+ private:
+  void Init();
 
- private:
   // IPC::Channel::Listener implementation:
   virtual void OnMessageReceived(const IPC::Message& msg);
   virtual void OnChannelError();
 
-  // The message loop used to run tasks on the thread that started this thread.
-  MessageLoop* owner_loop_;
-
   std::string channel_name_;
   scoped_ptr<IPC::SyncChannel> channel_;
 
-  // Used only on the background render thread to implement message routing
-  // functionality to the consumers of the ChildThread.
+  // Implements message routing functionality to the consumers of ChildThread.
   MessageRouter router_;
 
-  Thread::Options options_;
-
   // Handles resource loads for this process.
-  // NOTE: this object lives on the owner thread.
   scoped_ptr<ResourceDispatcher> resource_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_;
 
+  MessageLoop* message_loop_;
+
+  scoped_ptr<NotificationService> notification_service_;
+
   DISALLOW_COPY_AND_ASSIGN(ChildThread);
 };
 
 #endif  // CHROME_COMMON_CHILD_THREAD_H_