Reland "[Fuchsia, ozone] Implement ScenicWindow"

This is a reland of 502b5a8a

TBR=sky@chromium.org

Original change's description:
> [Fuchsia, ozone] Implement ScenicWindow
>
> ScenicWindow now creates View and listens to input events (mouse and keyboard).
>
> Bug: 829980
> Change-Id: If5d05bf1107fec553aecf2537fd197d177d2fbb1
> Reviewed-on: https://chromium-review.googlesource.com/1081609
> Commit-Queue: Sergey Ulanov <sergeyu@chromium.org>
> Reviewed-by: Robert Kroeger <rjkroege@chromium.org>
> Reviewed-by: Scott Violet <sky@chromium.org>
> Reviewed-by: Wez <wez@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#568293}

Bug: 829980
Change-Id: I8e3d6f83d4f38d40da065922f85866a1419712d8
Reviewed-on: https://chromium-review.googlesource.com/1105098Reviewed-by: Sergey Ulanov <sergeyu@chromium.org>
Commit-Queue: Sergey Ulanov <sergeyu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#568361}

ui/compositor/BUILD.gn

@@ -184,7 +184,10 @@ static_library("test_support") {
   if (use_ozone) {
     sources += [ "test/test_compositor_host_ozone.cc" ]
 
-    deps += [ "//ui/ozone" ]
+    deps += [
+      "//ui/ozone",
+      "//ui/platform_window",
+    ]
   } else if (use_x11) {
     sources += [ "test/test_compositor_host_x11.cc" ]
   }

ui/ozone/platform/scenic/BUILD.gn

@@ -29,6 +29,8 @@ source_set("scenic") {
     "//third_party/fuchsia-sdk:images",
     "//third_party/fuchsia-sdk:mem",
     "//third_party/fuchsia-sdk:scenic",
+    "//third_party/fuchsia-sdk:views_v1",
+    "//third_party/fuchsia-sdk:views_v1_token",
     "//ui/base",
     "//ui/display/manager",
     "//ui/events/ozone:events_ozone_layout",

ui/ozone/platform/scenic/ozone_platform_scenic.cc

@@ -75,8 +75,12 @@ class OzonePlatformScenic : public OzonePlatform {
   std::unique_ptr<PlatformWindow> CreatePlatformWindow(
       PlatformWindowDelegate* delegate,
       PlatformWindowInitProperties properties) override {
-    NOTREACHED();
-    return nullptr;
+    if (!properties.view_owner_request) {
+      NOTREACHED();
+      return nullptr;
+    }
+    return std::make_unique<ScenicWindow>(
+        &window_manager_, delegate, std::move(properties.view_owner_request));
   }
 
   std::unique_ptr<display::NativeDisplayDelegate> CreateNativeDisplayDelegate()

ui/ozone/platform/scenic/scenic_window.cc

@@ -6,6 +6,9 @@
 
 #include <string>
 
+#include <fuchsia/sys/cpp/fidl.h>
+
+#include "base/fuchsia/fuchsia_logging.h"
 #include "ui/events/event.h"
 #include "ui/events/event_constants.h"
 #include "ui/events/keycodes/dom/keycode_converter.h"
@@ -16,25 +19,94 @@
 
 namespace ui {
 
-ScenicWindow::ScenicWindow(ScenicWindowManager* window_manager,
-                           PlatformWindowDelegate* delegate)
+namespace {
+
+const uint32_t kUsbHidKeyboardPage = 0x07;
+
+int KeyModifiersToFlags(int modifiers) {
+  int flags = 0;
+  if (modifiers & fuchsia::ui::input::kModifierShift)
+    flags |= EF_SHIFT_DOWN;
+  if (modifiers & fuchsia::ui::input::kModifierControl)
+    flags |= EF_CONTROL_DOWN;
+  if (modifiers & fuchsia::ui::input::kModifierAlt)
+    flags |= EF_ALT_DOWN;
+  // TODO(crbug.com/850697): Add AltGraph support.
+  return flags;
+}
+
+}  // namespace
+
+ScenicWindow::ScenicWindow(
+    ScenicWindowManager* window_manager,
+    PlatformWindowDelegate* delegate,
+    fidl::InterfaceRequest<fuchsia::ui::views_v1_token::ViewOwner>
+        view_owner_request)
     : manager_(window_manager),
       delegate_(delegate),
-      window_id_(manager_->AddWindow(this)) {
-  delegate_->OnAcceleratedWidgetAvailable(window_id_,
-                                          /*device_pixel_ratio=*/1.0);
+      window_id_(manager_->AddWindow(this)),
+      view_listener_binding_(this),
+      scenic_session_(manager_->GetScenic(), this),
+      input_listener_binding_(this) {
+  // Create event pair to import parent view node to Scenic. One end is passed
+  // directly to Scenic in ImportResource command and the second one is passed
+  // to ViewManager::CreateView(). ViewManager will passes it to Scenic when the
+  // view is added to a container.
+  zx::eventpair parent_export_token;
+  zx::eventpair parent_import_token;
+  zx_status_t status =
+      zx::eventpair::create(0u, &parent_import_token, &parent_export_token);
+  ZX_CHECK(status == ZX_OK, status) << "zx_eventpair_create()";
+
+  // Create a new node and add it as a child to the parent.
+  parent_node_id_ = scenic_session_.ImportResource(
+      fuchsia::ui::gfx::ImportSpec::NODE, std::move(parent_import_token));
+  node_id_ = scenic_session_.CreateEntityNode();
+  scenic_session_.AddNodeChild(parent_node_id_, node_id_);
+
+  // Subscribe to metrics events from the parent node. These events are used to
+  // get |device_pixel_ratio_| for the screen.
+  scenic_session_.SetEventMask(parent_node_id_,
+                               fuchsia::ui::gfx::kMetricsEventMask);
+
+  // Create the view.
+  manager_->GetViewManager()->CreateView(
+      view_.NewRequest(), std::move(view_owner_request),
+      view_listener_binding_.NewBinding(), std::move(parent_export_token),
+      "Chromium");
+  view_.set_error_handler(fit::bind_member(this, &ScenicWindow::OnViewError));
+  view_listener_binding_.set_error_handler(
+      fit::bind_member(this, &ScenicWindow::OnViewError));
+
+  // Setup input event listener.
+  fuchsia::sys::ServiceProviderPtr view_service_provider;
+  view_->GetServiceProvider(view_service_provider.NewRequest());
+  view_service_provider->ConnectToService(
+      fuchsia::ui::input::InputConnection::Name_,
+      input_connection_.NewRequest().TakeChannel());
+  input_connection_->SetEventListener(input_listener_binding_.NewBinding());
+
+  // Call Present() to ensure that the scenic session commands are processed,
+  // which is necessary to receive metrics event from Scenic.
+  // OnAcceleratedWidgetAvailable() will be called after View metrics are
+  // received.
+  scenic_session_.Present();
 }
 
 ScenicWindow::~ScenicWindow() {
   delegate_->OnAcceleratedWidgetDestroying();
 
+  scenic_session_.ReleaseResource(node_id_);
+  scenic_session_.ReleaseResource(parent_node_id_);
+
   manager_->RemoveWindow(window_id_, this);
+  view_.Unbind();
 
   delegate_->OnAcceleratedWidgetDestroyed();
 }
 
 gfx::Rect ScenicWindow::GetBounds() {
-  return gfx::Rect(size_);
+  return gfx::Rect(size_pixels_);
 }
 
 void ScenicWindow::SetBounds(const gfx::Rect& bounds) {
@@ -112,4 +184,167 @@ PlatformImeController* ScenicWindow::GetPlatformImeController() {
   return nullptr;
 }
 
+void ScenicWindow::UpdateSize() {
+  gfx::SizeF scaled = ScaleSize(size_dips_, device_pixel_ratio_);
+  size_pixels_ = gfx::Size(ceilf(scaled.width()), ceilf(scaled.height()));
+  delegate_->OnBoundsChanged(gfx::Rect(size_pixels_));
+}
+
+void ScenicWindow::OnPropertiesChanged(
+    fuchsia::ui::views_v1::ViewProperties properties,
+    OnPropertiesChangedCallback callback) {
+  if (properties.view_layout) {
+    size_dips_.SetSize(properties.view_layout->size.width,
+                       properties.view_layout->size.height);
+    if (device_pixel_ratio_ > 0.0)
+      UpdateSize();
+  }
+
+  callback();
+}
+
+void ScenicWindow::OnScenicError(const std::string& error) {
+  LOG(ERROR) << "ScenicSession failed: " << error;
+  delegate_->OnClosed();
+}
+
+void ScenicWindow::OnScenicEvents(
+    const std::vector<fuchsia::ui::scenic::Event>& events) {
+  for (const auto& event : events) {
+    if (!event.is_gfx() || !event.gfx().is_metrics())
+      continue;
+
+    auto& metrics = event.gfx().metrics();
+    if (metrics.node_id == parent_node_id_) {
+      float new_device_pixel_ratio =
+          std::max(metrics.metrics.scale_x, metrics.metrics.scale_y);
+      if (device_pixel_ratio_ == 0.0) {
+        device_pixel_ratio_ = new_device_pixel_ratio;
+        delegate_->OnAcceleratedWidgetAvailable(window_id_,
+                                                device_pixel_ratio_);
+        if (!size_dips_.IsEmpty())
+          UpdateSize();
+      } else if (device_pixel_ratio_ != new_device_pixel_ratio) {
+        // Ozone currently doesn't support dynamic changes in
+        // device_pixel_ratio.
+        // TODO(crbug.com/850650): Update Ozone/Aura to allow DPI changes
+        // after OnAcceleratedWidgetAvailable().
+        NOTIMPLEMENTED() << "Ignoring display metrics event.";
+      }
+    }
+  }
+}
+
+void ScenicWindow::OnEvent(fuchsia::ui::input::InputEvent event,
+                           OnEventCallback callback) {
+  bool result = false;
+
+  switch (event.Which()) {
+    case fuchsia::ui::input::InputEvent::Tag::kPointer:
+      // TODO(crbug.com/829980): Add touch support.
+      if (event.pointer().type == fuchsia::ui::input::PointerEventType::MOUSE)
+        result = OnMouseEvent(event.pointer());
+      break;
+
+    case fuchsia::ui::input::InputEvent::Tag::kKeyboard:
+      result = OnKeyboardEvent(event.keyboard());
+      break;
+
+    case fuchsia::ui::input::InputEvent::Tag::kFocus:
+    case fuchsia::ui::input::InputEvent::Tag::Invalid:
+      break;
+  }
+
+  callback(result);
+}
+
+void ScenicWindow::OnViewError() {
+  VLOG(1) << "views_v1::View connection was closed.";
+  delegate_->OnClosed();
+}
+
+bool ScenicWindow::OnMouseEvent(const fuchsia::ui::input::PointerEvent& event) {
+  int flags = 0;
+  if (event.buttons & 1)
+    flags |= EF_LEFT_MOUSE_BUTTON;
+  if (event.buttons & 2)
+    flags |= EF_RIGHT_MOUSE_BUTTON;
+  if (event.buttons & 4)
+    flags |= EF_MIDDLE_MOUSE_BUTTON;
+
+  EventType event_type;
+
+  switch (event.phase) {
+    case fuchsia::ui::input::PointerEventPhase::DOWN:
+      event_type = ET_MOUSE_PRESSED;
+      break;
+    case fuchsia::ui::input::PointerEventPhase::MOVE:
+      event_type = flags ? ET_MOUSE_DRAGGED : ET_MOUSE_MOVED;
+      break;
+    case fuchsia::ui::input::PointerEventPhase::UP:
+      event_type = ET_MOUSE_RELEASED;
+      break;
+
+    // Following phases are not expected for mouse events.
+    case fuchsia::ui::input::PointerEventPhase::HOVER:
+    case fuchsia::ui::input::PointerEventPhase::CANCEL:
+    case fuchsia::ui::input::PointerEventPhase::ADD:
+    case fuchsia::ui::input::PointerEventPhase::REMOVE:
+      NOTREACHED() << "Unexpected mouse phase " << event.phase;
+      return false;
+  }
+
+  gfx::Point location =
+      gfx::Point(event.x * device_pixel_ratio_, event.y * device_pixel_ratio_);
+  ui::MouseEvent mouse_event(event_type, location, location,
+                             base::TimeTicks::FromZxTime(event.event_time),
+                             flags, 0);
+  delegate_->DispatchEvent(&mouse_event);
+  return true;
+}
+
+bool ScenicWindow::OnKeyboardEvent(
+    const fuchsia::ui::input::KeyboardEvent& event) {
+  EventType event_type;
+
+  switch (event.phase) {
+    case fuchsia::ui::input::KeyboardEventPhase::PRESSED:
+    case fuchsia::ui::input::KeyboardEventPhase::REPEAT:
+      event_type = ET_KEY_PRESSED;
+      break;
+
+    case fuchsia::ui::input::KeyboardEventPhase::RELEASED:
+      event_type = ET_KEY_RELEASED;
+      break;
+
+    case fuchsia::ui::input::KeyboardEventPhase::CANCELLED:
+      NOTIMPLEMENTED() << "Key event cancellation is not supported.";
+      event_type = ET_KEY_RELEASED;
+      break;
+  }
+
+  // Currently KeyboardEvent doesn't specify HID Usage page. |hid_usage|
+  // field always contains values from the Keyboard page. See
+  // https://fuchsia.atlassian.net/browse/SCN-762 .
+  DomCode dom_code = KeycodeConverter::UsbKeycodeToDomCode(
+      (kUsbHidKeyboardPage << 16) | event.hid_usage);
+  DomKey dom_key;
+  KeyboardCode key_code;
+  if (!DomCodeToUsLayoutDomKey(dom_code, KeyModifiersToFlags(event.modifiers),
+                               &dom_key, &key_code)) {
+    LOG(ERROR) << "DomCodeToUsLayoutDomKey() failed for usb_key: "
+               << event.hid_usage;
+    key_code = VKEY_UNKNOWN;
+  }
+
+  if (event.code_point)
+    dom_key = DomKey::FromCharacter(event.code_point);
+
+  KeyEvent key_event(ET_KEY_PRESSED, key_code, dom_code,
+                     KeyModifiersToFlags(event.modifiers), dom_key,
+                     base::TimeTicks::FromZxTime(event.event_time));
+  delegate_->DispatchEvent(&key_event);
+  return true;
+}
+
 }  // namespace ui

ui/ozone/platform/scenic/scenic_window.h

@@ -5,10 +5,16 @@
 #ifndef UI_OZONE_PLATFORM_SCENIC_SCENIC_WINDOW_H_
 #define UI_OZONE_PLATFORM_SCENIC_SCENIC_WINDOW_H_
 
+#include <fuchsia/ui/input/cpp/fidl.h>
+#include <fuchsia/ui/views_v1/cpp/fidl.h>
+
 #include "base/macros.h"
 #include "ui/gfx/geometry/rect.h"
+#include "ui/gfx/geometry/size.h"
+#include "ui/gfx/geometry/size_f.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/ozone/ozone_export.h"
+#include "ui/ozone/platform/scenic/scenic_session.h"
 #include "ui/platform_window/platform_window.h"
 
 namespace ui {
@@ -16,13 +22,25 @@ namespace ui {
 class ScenicWindowManager;
 class PlatformWindowDelegate;
 
-class OZONE_EXPORT ScenicWindow : public PlatformWindow {
+class OZONE_EXPORT ScenicWindow : public PlatformWindow,
+                                  public ScenicSessionListener,
+                                  public fuchsia::ui::views_v1::ViewListener,
+                                  public fuchsia::ui::input::InputListener {
  public:
   // Both |window_manager| and |delegate| must outlive the ScenicWindow.
+  // |view_owner_request| is passed to the view managed when creating the
+  // underlying view. In order for the View to be displayed the ViewOwner must
+  // be used to add the view to a ViewContainer.
   ScenicWindow(ScenicWindowManager* window_manager,
-               PlatformWindowDelegate* delegate);
+               PlatformWindowDelegate* delegate,
+               fidl::InterfaceRequest<fuchsia::ui::views_v1_token::ViewOwner>
+                   view_owner_request);
   ~ScenicWindow() override;
 
+  ScenicSession* scenic_session() { return &scenic_session_; }
+  ScenicSession::ResourceId node_id() const { return node_id_; }
+  float device_pixel_ratio() const { return device_pixel_ratio_; }
+
   // PlatformWindow implementation.
   gfx::Rect GetBounds() override;
   void SetBounds(const gfx::Rect& bounds) override;
@@ -45,11 +63,59 @@ class OZONE_EXPORT ScenicWindow : public PlatformWindow {
   PlatformImeController* GetPlatformImeController() override;
 
  private:
+  // views::ViewListener interface.
+  void OnPropertiesChanged(fuchsia::ui::views_v1::ViewProperties properties,
+                           OnPropertiesChangedCallback callback) override;
+
+  // fuchsia::ui::input::InputListener interface.
+  void OnEvent(fuchsia::ui::input::InputEvent event,
+               OnEventCallback callback) override;
+
+  // ScenicSessionListener interface.
+  void OnScenicError(const std::string& error) override;
+  void OnScenicEvents(
+      const std::vector<fuchsia::ui::scenic::Event>& events) override;
+
+  // Error handler for |view_|. This error normally indicates the View was
+  // destroyed (e.g. dropping ViewOwner).
+  void OnViewError();
+
+  void UpdateSize();
+
+  bool OnMouseEvent(const fuchsia::ui::input::PointerEvent& event);
+  bool OnKeyboardEvent(const fuchsia::ui::input::KeyboardEvent& event);
+
   ScenicWindowManager* const manager_;
   PlatformWindowDelegate* const delegate_;
   gfx::AcceleratedWidget const window_id_;
 
-  gfx::Size size_;
+  // Underlying View in the view_manager.
+  fuchsia::ui::views_v1::ViewPtr view_;
+  fidl::Binding<fuchsia::ui::views_v1::ViewListener> view_listener_binding_;
+
+  // Scenic session used for all drawing operations in this View.
+  ScenicSession scenic_session_;
+
+  // Node ID in |scenic_session_| for the parent view.
+  ScenicSession::ResourceId parent_node_id_;
+
+  // Node ID in |scenic_session_| for the view.
+  ScenicSession::ResourceId node_id_;
+
+  // Current view size in DIPs.
+  gfx::SizeF size_dips_;
+
+  // Current view size in device pixels.
+  gfx::Size size_pixels_;
+
+  // Device pixel ratio for the current device. Initialized in
+  // OnPropertiesChanged().
+  float device_pixel_ratio_ = 0.0;
+
+  // InputConnection and InputListener binding used to receive input events from
+  // the view.
+  fuchsia::ui::input::InputConnectionPtr input_connection_;
+  fidl::Binding<fuchsia::ui::input::InputListener> input_listener_binding_;
 
   DISALLOW_COPY_AND_ASSIGN(ScenicWindow);
 };

ui/ozone/platform/scenic/scenic_window_manager.cc

@@ -11,6 +11,27 @@ namespace ui {
 ScenicWindowManager::ScenicWindowManager() = default;
 ScenicWindowManager::~ScenicWindowManager() = default;
 
+fuchsia::ui::views_v1::ViewManager* ScenicWindowManager::GetViewManager() {
+  if (!view_manager_) {
+    view_manager_ =
+        base::fuchsia::ComponentContext::GetDefault()
+            ->ConnectToService<fuchsia::ui::views_v1::ViewManager>();
+    view_manager_.set_error_handler(
+        [this]() { LOG(FATAL) << "ViewManager connection failed."; });
+  }
+
+  return view_manager_.get();
+}
+
+fuchsia::ui::scenic::Scenic* ScenicWindowManager::GetScenic() {
+  if (!scenic_) {
+    GetViewManager()->GetScenic(scenic_.NewRequest());
+    scenic_.set_error_handler(
+        [this]() { LOG(FATAL) << "Scenic connection failed."; });
+  }
+  return scenic_.get();
+}
+
 int32_t ScenicWindowManager::AddWindow(ScenicWindow* window) {
   return windows_.Add(window);
 }

ui/ozone/platform/scenic/scenic_window_manager.h

@@ -6,9 +6,10 @@
 #define UI_OZONE_PLATFORM_SCENIC_SCENIC_WINDOW_MANAGER_H_
 
 #include <stdint.h>
-
 #include <memory>
 
+#include <fuchsia/ui/views_v1/cpp/fidl.h>
+
 #include "base/containers/id_map.h"
 #include "base/macros.h"
 #include "base/threading/thread_checker.h"
@@ -32,6 +33,12 @@ class OZONE_EXPORT ScenicWindowManager {
   ScenicWindowManager();
   ~ScenicWindowManager();
 
+  // ViewManager and Scenic services that are used by ScenicWindow. Both
+  // interfaces are initialized lazily on the first call and they don't change
+  // afterwards. ScenicWindowManager keeps the ownership.
+  fuchsia::ui::views_v1::ViewManager* GetViewManager();
+  fuchsia::ui::scenic::Scenic* GetScenic();
+
   // Called by ScenicWindow when a new window instance is created. Returns
   // window ID for the |window|.
   int32_t AddWindow(ScenicWindow* window);
@@ -44,6 +51,9 @@ class OZONE_EXPORT ScenicWindowManager {
  private:
   base::IDMap<ScenicWindow*> windows_;
 
+  fuchsia::ui::views_v1::ViewManagerPtr view_manager_;
+  fuchsia::ui::scenic::ScenicPtr scenic_;
+
   DISALLOW_COPY_AND_ASSIGN(ScenicWindowManager);
 };
 

ui/platform_window/BUILD.gn

@@ -9,6 +9,7 @@ source_set("platform_window") {
     "platform_ime_controller.h",
     "platform_window.h",
     "platform_window_delegate.h",
+    "platform_window_init_properties.cc",
     "platform_window_init_properties.h",
     "text_input_state.cc",
     "text_input_state.h",
@@ -20,6 +21,12 @@ source_set("platform_window") {
     "//ui/base/ime:text_input_types",
     "//ui/gfx",
   ]
+
+  if (is_fuchsia) {
+    public_deps = [
+      "//third_party/fuchsia-sdk:views_v1_token",
+    ]
+  }
 }
 
 group("platform_impls") {

ui/platform_window/platform_window_init_properties.cc

+// Copyright 2018 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/platform_window/platform_window_init_properties.h"
+
+namespace ui {
+
+PlatformWindowInitProperties::PlatformWindowInitProperties() = default;
+PlatformWindowInitProperties::PlatformWindowInitProperties(
+    PlatformWindowInitProperties&& props) = default;
+
+PlatformWindowInitProperties::~PlatformWindowInitProperties() = default;
+
+}  // namespace ui

ui/platform_window/platform_window_init_properties.h

@@ -7,9 +7,14 @@
 
 #include <string>
 
+#include "build/build_config.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/native_widget_types.h"
 
+#if defined(OS_FUCHSIA)
+#include <fuchsia/ui/views_v1_token/cpp/fidl.h>
+#endif
+
 namespace ui {
 
 enum PlatformWindowType {
@@ -21,6 +26,11 @@ enum PlatformWindowType {
 // Initial properties which are passed to PlatformWindow to be initialized
 // with a desired set of properties.
 struct PlatformWindowInitProperties {
+  PlatformWindowInitProperties();
+  PlatformWindowInitProperties(PlatformWindowInitProperties&& props);
+
+  ~PlatformWindowInitProperties();
+
   // Tells desired PlatformWindow type. It can be popup, menu or anything else.
   PlatformWindowType type = PlatformWindowType::PLATFORM_WINDOW_TYPE_WINDOW;
   // Sets the desired initial bounds. Can be empty.
@@ -28,6 +38,11 @@ struct PlatformWindowInitProperties {
   // Tells PlatformWindow which native widget its parent holds. It is usually
   // used to find a parent from internal list of PlatformWindows.
   gfx::AcceleratedWidget parent_widget = gfx::kNullAcceleratedWidget;
+
+#if defined(OS_FUCHSIA)
+  fidl::InterfaceRequest<fuchsia::ui::views_v1_token::ViewOwner>
+      view_owner_request;
+#endif
 };
 
 }  // namespace ui

ui/views/widget/desktop_aura/desktop_window_tree_host_platform.cc

@@ -75,7 +75,7 @@ void DesktopWindowTreeHostPlatform::Init(const Widget::InitParams& params) {
   ui::PlatformWindowInitProperties properties =
       ConvertWidgetInitParamsToInitProperties(params);
 
-  CreateAndSetPlatformWindow(properties);
+  CreateAndSetPlatformWindow(std::move(properties));
   CreateCompositor(viz::FrameSinkId(), params.force_software_compositing);
   aura::WindowTreeHost::OnAcceleratedWidgetAvailable();
   InitHost();