Refactor and move ash independent nested accelerator code to ui/wm/core

ash/accelerators/nested_dispatcher_controller.cc

-// Copyright 2014 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 "ash/accelerators/nested_dispatcher_controller.h"
-
-#include "ash/accelerators/accelerator_dispatcher.h"
-#include "ash/shell.h"
-#include "base/auto_reset.h"
-#include "base/run_loop.h"
-
-namespace ash {
-
-NestedDispatcherController::NestedDispatcherController() {
-}
-
-NestedDispatcherController::~NestedDispatcherController() {
-}
-
-void NestedDispatcherController::RunWithDispatcher(
-    base::MessagePumpDispatcher* nested_dispatcher) {
-  base::MessageLoopForUI* loop = base::MessageLoopForUI::current();
-  base::MessageLoopForUI::ScopedNestableTaskAllower allow_nested(loop);
-
-  scoped_ptr<AcceleratorDispatcher> old_accelerator_dispatcher =
-      accelerator_dispatcher_.Pass();
-  accelerator_dispatcher_ = AcceleratorDispatcher::Create(nested_dispatcher);
-
-  // TODO(jbates) crbug.com/134753 Find quitters of this RunLoop and have them
-  //              use run_loop.QuitClosure().
-  scoped_ptr<base::RunLoop> run_loop = accelerator_dispatcher_->CreateRunLoop();
-  base::AutoReset<base::Closure> reset_closure(&quit_closure_,
-                                               run_loop->QuitClosure());
-  run_loop->Run();
-  accelerator_dispatcher_ = old_accelerator_dispatcher.Pass();
-}
-
-void NestedDispatcherController::QuitNestedMessageLoop() {
-  CHECK(!quit_closure_.is_null());
-  quit_closure_.Run();
-  accelerator_dispatcher_.reset();
-}
-
-}  // namespace ash