wm: Change the DispatcherClient interface.

ui/wm/public/dispatcher_client.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 "ui/wm/public/dispatcher_client.h"
 
+#include "base/callback.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_property.h"
 
 DECLARE_WINDOW_PROPERTY_TYPE(aura::client::DispatcherClient*);
 
 namespace aura {
 namespace client {
 
+DispatcherRunLoop::DispatcherRunLoop(DispatcherClient* client,
+                                     base::MessagePumpDispatcher* dispatcher) {
+  client->PrepareNestedLoopClosures(dispatcher, &run_closure_, &quit_closure_);
+}
+
+DispatcherRunLoop::~DispatcherRunLoop() {
+}
+
+void DispatcherRunLoop::Run() {
+  base::MessageLoopForUI* loop = base::MessageLoopForUI::current();
+  base::MessageLoopForUI::ScopedNestableTaskAllower allow_nested(loop);
+  run_closure_.Run();
+}
+
+base::Closure DispatcherRunLoop::QuitClosure() {
+  return quit_closure_;
+}
+
+void DispatcherRunLoop::Quit() {
+  quit_closure_.Run();
+}
+
 DEFINE_LOCAL_WINDOW_PROPERTY_KEY(DispatcherClient*, kDispatcherClientKey, NULL);
 
 void SetDispatcherClient(Window* root_window, DispatcherClient* client) {
   DCHECK_EQ(root_window->GetRootWindow(), root_window);
   root_window->SetProperty(kDispatcherClientKey, client);
 }
 
 DispatcherClient* GetDispatcherClient(Window* root_window) {
   if (root_window)
     DCHECK_EQ(root_window->GetRootWindow(), root_window);
   return root_window ? root_window->GetProperty(kDispatcherClientKey) : NULL;
 }
 
 }  // namespace client
 }  // namespace aura