wm: Change the DispatcherClient interface.

ui/views/widget/desktop_aura/desktop_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/views/widget/desktop_aura/desktop_dispatcher_client.h"
 
 #include "base/auto_reset.h"
+#include "base/bind.h"
 #include "base/run_loop.h"
 
 namespace views {
 
-DesktopDispatcherClient::DesktopDispatcherClient()
-    : weak_ptr_factory_(this) {}
+DesktopDispatcherClient::DesktopDispatcherClient() {
+}
 
 DesktopDispatcherClient::~DesktopDispatcherClient() {
 }
 
-void DesktopDispatcherClient::RunWithDispatcher(
-    base::MessagePumpDispatcher* nested_dispatcher) {
-  // TODO(erg): This class has been copypastad from
-  // ash/accelerators/nested_dispatcher_controller.cc. I have left my changes
-  // commented out because I don't entirely understand the implications of the
-  // change.
-  base::MessageLoopForUI* loop = base::MessageLoopForUI::current();
-  base::MessageLoopForUI::ScopedNestableTaskAllower allow_nested(loop);
-
-  base::Closure old_quit_closure = quit_closure_;
+void DesktopDispatcherClient::PrepareNestedLoopClosures(
+    base::MessagePumpDispatcher* dispatcher,
+    base::Closure* run_closure,
+    base::Closure* quit_closure) {
 #if defined(OS_WIN)
-  base::RunLoop run_loop(nested_dispatcher);
+  scoped_ptr<base::RunLoop> run_loop(new base::RunLoop(dispatcher));
 #else
-  base::RunLoop run_loop;
+  scoped_ptr<base::RunLoop> run_loop(new base::RunLoop());
 #endif
-
-  quit_closure_ = run_loop.QuitClosure();
-  base::WeakPtr<DesktopDispatcherClient> alive(weak_ptr_factory_.GetWeakPtr());
-  run_loop.Run();
-  if (alive) {
-    weak_ptr_factory_.InvalidateWeakPtrs();
-    quit_closure_ = old_quit_closure;
-  }
-}
-
-void DesktopDispatcherClient::QuitNestedMessageLoop() {
-  CHECK(!quit_closure_.is_null());
-  quit_closure_.Run();
+  *quit_closure = run_loop->QuitClosure();
+  *run_closure =
+      base::Bind(&base::RunLoop::Run, base::Owned(run_loop.release()));
 }
 
 }  // namespace views