Revert 119198 - First pass at implementing the MessageLoop interface. This includes a simple

ppapi/examples/threading/threading.cc

-// Copyright (c) 2012 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.
-
-#include "ppapi/c/pp_errors.h"
-#include "ppapi/cpp/input_event.h"
-#include "ppapi/cpp/instance.h"
-#include "ppapi/cpp/module.h"
-#include "ppapi/utility/completion_callback_factory.h"
-#include "ppapi/utility/threading/simple_thread.h"
-
-class MyInstance : public pp::Instance {
- public:
-  MyInstance(PP_Instance instance) : pp::Instance(instance) {
-    thread_ = new pp::SimpleThread(this);
-    factory_.Initialize(this);
-  }
-
-  virtual ~MyInstance() {
-    delete thread_;
-  }
-
-  virtual bool Init(uint32_t argc, const char* argn[], const char* argv[]) {
-    thread_->Start();
-    thread_->message_loop().PostWork(
-        factory_.NewCallback(&MyInstance::CallOnBackground));
-    return true;
-  }
-
-  virtual void DidChangeView(const pp::View& view) {
-  }
-
- private:
-  void CallOnBackground(int32_t result) {
-  }
-
-  pp::CompletionCallbackFactory<MyInstance> factory_;
-
-  pp::SimpleThread* thread_;
-};
-
-
-class MyModule : public pp::Module {
- public:
-  MyModule() : pp::Module() {}
-  virtual ~MyModule() {}
-
-  virtual pp::Instance* CreateInstance(PP_Instance instance) {
-    return new MyInstance(instance);
-  }
-};
-
-namespace pp {
-
-// Factory function for your specialization of the Module object.
-Module* CreateModule() {
-  return new MyModule();
-}
-
-}  // namespace pp