DesktopAura: Track windows "owned" via the DesktopWindowTreeHost

chrome/test/base/view_event_test_platform_part_default.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 <memory>
-
-#include "base/macros.h"
-#include "chrome/test/base/view_event_test_platform_part.h"
-#include "ui/aura/env.h"
-#include "ui/display/screen.h"
-#include "ui/views/widget/desktop_aura/desktop_screen.h"
-
-#if !defined(OS_CHROMEOS) && defined(OS_LINUX)
-#include "ui/views/test/test_desktop_screen_x11.h"
-#endif
-
-namespace {
-
-// ViewEventTestPlatformPart implementation for Views, but non-CrOS.
-class ViewEventTestPlatformPartDefault : public ViewEventTestPlatformPart {
- public:
-  ViewEventTestPlatformPartDefault(
-      ui::ContextFactory* context_factory,
-      ui::ContextFactoryPrivate* context_factory_private) {
-#if defined(USE_AURA)
-    DCHECK(!display::Screen::GetScreen());
-#if defined(USE_X11) && !defined(OS_CHROMEOS)
-    display::Screen::SetScreenInstance(
-        views::test::TestDesktopScreenX11::GetInstance());
-#else
-    screen_.reset(views::CreateDesktopScreen());
-    display::Screen::SetScreenInstance(screen_.get());
-#endif
-    env_ = aura::Env::CreateInstance();
-    env_->set_context_factory(context_factory);
-    env_->set_context_factory_private(context_factory_private);
-#endif
-  }
-
-  ~ViewEventTestPlatformPartDefault() override {
-#if defined(USE_AURA)
-    env_.reset();
-    display::Screen::SetScreenInstance(nullptr);
-#endif
-  }
-
-  // Overridden from ViewEventTestPlatformPart:
-  gfx::NativeWindow GetContext() override { return NULL; }
-
- private:
-  std::unique_ptr<display::Screen> screen_;
-  std::unique_ptr<aura::Env> env_;
-
-  DISALLOW_COPY_AND_ASSIGN(ViewEventTestPlatformPartDefault);
-};
-
-}  // namespace
-
-// static
-ViewEventTestPlatformPart* ViewEventTestPlatformPart::Create(
-    ui::ContextFactory* context_factory,
-    ui::ContextFactoryPrivate* context_factory_private) {
-  return new ViewEventTestPlatformPartDefault(context_factory,
-                                              context_factory_private);
-}