re-re-land of https://codereview.chromium.org/11364053/

ui/aura/desktop/desktop_stacking_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/aura/desktop/desktop_stacking_client.h"
-
-#include "ui/aura/client/activation_client.h"
-#include "ui/aura/client/default_capture_client.h"
-#include "ui/aura/desktop/desktop_activation_client.h"
-#include "ui/aura/focus_manager.h"
-#include "ui/aura/root_window.h"
-#include "ui/aura/window.h"
-#include "ui/views/corewm/compound_event_filter.h"
-#include "ui/views/corewm/input_method_event_filter.h"
-
-namespace aura {
-
-DesktopStackingClient::DesktopStackingClient()
-    : window_event_filter_(NULL) {
-  client::SetStackingClient(this);
-}
-
-DesktopStackingClient::~DesktopStackingClient() {
-  if (window_event_filter_)
-    window_event_filter_->RemoveFilter(input_method_filter_.get());
-
-  client::SetStackingClient(NULL);
-}
-
-Window* DesktopStackingClient::GetDefaultParent(Window* window,
-                                                const gfx::Rect& bounds) {
-  if (!null_parent_.get())
-    CreateNULLParent();
-
-  return null_parent_.get();
-}
-
-void DesktopStackingClient::CreateNULLParent() {
-  focus_manager_.reset(new FocusManager);
-
-  activation_client_.reset(new DesktopActivationClient(focus_manager_.get()));
-
-  null_parent_.reset(new RootWindow(
-      RootWindow::CreateParams(gfx::Rect(100, 100))));
-  null_parent_->Init();
-  null_parent_->set_focus_manager(focus_manager_.get());
-
-  client::SetActivationClient(null_parent_.get(), activation_client_.get());
-
-  window_event_filter_ = new views::corewm::CompoundEventFilter;
-  null_parent_->SetEventFilter(window_event_filter_);
-
-  input_method_filter_.reset(new views::corewm::InputMethodEventFilter);
-  input_method_filter_->SetInputMethodPropertyInRootWindow(null_parent_.get());
-  window_event_filter_->AddFilter(input_method_filter_.get());
-
-  capture_client_.reset(new client::DefaultCaptureClient(null_parent_.get()));
-}
-
-}  // namespace aura