Re-land: Create a new views_aura_desktop.

Get views::Widget rendering working against an aura::Window NativeWidget.

http://crbug.com/93944
TEST=none

Original review URL: http://codereview.chromium.org/7741027
Review URL: http://codereview.chromium.org/7747032

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@98331 0039d316-1c4b-4281-b951-d872f2087c98

aura/demo/demo_main.cc

@@ -3,14 +3,12 @@
 // found in the LICENSE file.
 
 #include "aura/desktop.h"
-#include "aura/desktop_host.h"
 #include "aura/window.h"
 #include "aura/window_delegate.h"
 #include "base/at_exit.h"
 #include "base/command_line.h"
 #include "base/i18n/icu_util.h"
 #include "base/memory/scoped_ptr.h"
-#include "base/message_loop.h"
 #include "third_party/skia/include/core/SkXfermode.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/base/ui_base_paths.h"
@@ -20,32 +18,21 @@
 
 namespace {
 
-// Trivial WindowDelegate implementation that draws a blue background.
+// Trivial WindowDelegate implementation that draws a colored background.
 class DemoWindowDelegate : public aura::WindowDelegate {
  public:
-  explicit DemoWindowDelegate(aura::Window* window, SkColor color);
+  explicit DemoWindowDelegate(SkColor color) : color_(color) {}
 
-  virtual void OnPaint(const gfx::Rect& bounds) OVERRIDE;
+  virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE {
+    canvas->AsCanvasSkia()->drawColor(color_, SkXfermode::kSrc_Mode);
+  }
 
  private:
-  aura::Window* window_;
-
   SkColor color_;
 
   DISALLOW_COPY_AND_ASSIGN(DemoWindowDelegate);
 };
 
-DemoWindowDelegate::DemoWindowDelegate(aura::Window* window, SkColor color)
-    : window_(window),
-      color_(color) {
-}
-
-void DemoWindowDelegate::OnPaint(const gfx::Rect& bounds) {
-  scoped_ptr<gfx::Canvas> canvas(
-      gfx::Canvas::CreateCanvas(bounds.width(), bounds.height(), false));
-  canvas->AsCanvasSkia()->drawColor(color_, SkXfermode::kSrc_Mode);
-  window_->SetCanvas(*canvas->AsCanvasSkia(), bounds.origin());
-}
 
 }  // namespace
 
@@ -63,43 +50,34 @@ int main(int argc, char** argv) {
   base::MessagePumpX::DisableGtkMessagePump();
 #endif
 
-  // Create the DesktopHost and Desktop.
-  scoped_ptr<aura::DesktopHost> host(
-      aura::DesktopHost::Create(gfx::Rect(200, 200, 1024, 768)));
-  aura::Desktop desktop(host->GetAcceleratedWidget(), host->GetSize());
-  host->SetDesktop(&desktop);
+  aura::Desktop::GetInstance();
 
   // Create a hierarchy of test windows.
-  aura::Window window1(&desktop);
+  DemoWindowDelegate window_delegate1(SK_ColorBLUE);
+  aura::Window window1(&window_delegate1);
   window1.set_id(1);
+  window1.Init();
   window1.SetBounds(gfx::Rect(100, 100, 400, 400), 0);
   window1.SetVisibility(aura::Window::VISIBILITY_SHOWN);
-  DemoWindowDelegate window_delegate1(&window1, SK_ColorBLUE);
-  window1.set_delegate(&window_delegate1);
-
-  desktop.window()->AddChild(&window1);
+  window1.SetParent(NULL);
 
-  aura::Window window2(&desktop);
+  DemoWindowDelegate window_delegate2(SK_ColorRED);
+  aura::Window window2(&window_delegate2);
   window2.set_id(2);
+  window2.Init();
   window2.SetBounds(gfx::Rect(200, 200, 350, 350), 0);
   window2.SetVisibility(aura::Window::VISIBILITY_SHOWN);
-  DemoWindowDelegate window_delegate2(&window2, SK_ColorRED);
-  window2.set_delegate(&window_delegate2);
+  window2.SetParent(NULL);
 
-  desktop.window()->AddChild(&window2);
-
-  aura::Window window3(&desktop);
+  DemoWindowDelegate window_delegate3(SK_ColorGREEN);
+  aura::Window window3(&window_delegate3);
   window3.set_id(3);
+  window3.Init();
   window3.SetBounds(gfx::Rect(10, 10, 50, 50), 0);
   window3.SetVisibility(aura::Window::VISIBILITY_SHOWN);
-  DemoWindowDelegate window_delegate3(&window3, SK_ColorGREEN);
-  window3.set_delegate(&window_delegate3);
-
-  window2.AddChild(&window3);
+  window3.SetParent(&window2);
 
-  host->Show();
-
-  MessageLoop main_message_loop(MessageLoop::TYPE_UI);
-  MessageLoopForUI::current()->Run(host.get());
+  aura::Desktop::GetInstance()->Run();
   return 0;
 }
+

aura/desktop.cc

@@ -4,21 +4,35 @@
 
 #include "aura/desktop.h"
 
+#include "aura/desktop_host.h"
 #include "aura/window.h"
 #include "base/logging.h"
+#include "base/message_loop.h"
 #include "ui/gfx/compositor/compositor.h"
 
 namespace aura {
 
-Desktop::Desktop(gfx::AcceleratedWidget widget, const gfx::Size& size)
-    : compositor_(ui::Compositor::Create(widget, size)) {
+// static
+Desktop* Desktop::instance_ = NULL;
+
+Desktop::Desktop()
+    : host_(aura::DesktopHost::Create(gfx::Rect(200, 200, 1024, 768))) {
+  compositor_ = ui::Compositor::Create(host_->GetAcceleratedWidget(),
+                                       host_->GetSize());
+  host_->SetDesktop(this);
   DCHECK(compositor_.get());
-  window_.reset(new Window(this));
+  window_.reset(new Window(NULL));
 }
 
 Desktop::~Desktop() {
 }
 
+void Desktop::Run() {
+  host_->Show();
+  MessageLoop main_message_loop(MessageLoop::TYPE_UI);
+  MessageLoopForUI::current()->Run(host_);
+}
+
 void Desktop::Draw() {
   // Second pass renders the layers.
   compositor_->NotifyStart();
@@ -30,4 +44,13 @@ bool Desktop::OnMouseEvent(const MouseEvent& event) {
   return window_->OnMouseEvent(event);
 }
 
+// static
+Desktop* Desktop::GetInstance() {
+  if (!instance_) {
+    instance_ = new Desktop;
+    instance_->window_->Init();
+  }
+  return instance_;
+}
+
 }  // namespace aura

aura/desktop.h

@@ -21,15 +21,19 @@ class Compositor;
 
 namespace aura {
 
+class DesktopHost;
 class MouseEvent;
 class Window;
 
 // Desktop is responsible for hosting a set of windows.
 class Desktop {
  public:
-  Desktop(gfx::AcceleratedWidget widget, const gfx::Size& size);
+  Desktop();
   ~Desktop();
 
+  // Shows the desktop host and runs an event loop for it.
+  void Run();
+
   // Draws the necessary set of windows.
   void Draw();
 
@@ -41,11 +45,17 @@ class Desktop {
 
   Window* window() { return window_.get(); }
 
+  static Desktop* GetInstance();
+
  private:
   scoped_refptr<ui::Compositor> compositor_;
 
   scoped_ptr<Window> window_;
 
+  DesktopHost* host_;
+
+  static Desktop* instance_;
+
   DISALLOW_COPY_AND_ASSIGN(Desktop);
 };
 

aura/window.cc

@@ -9,17 +9,15 @@
 #include "aura/desktop.h"
 #include "aura/window_delegate.h"
 #include "base/logging.h"
-#include "third_party/skia/include/core/SkCanvas.h"
+#include "ui/gfx/canvas_skia.h"
 #include "ui/gfx/compositor/compositor.h"
 #include "ui/gfx/compositor/layer.h"
 
 namespace aura {
 
-// TODO: do we need to support child windows?
-Window::Window(Desktop* desktop)
-    : delegate_(NULL),
+Window::Window(WindowDelegate* delegate)
+    : delegate_(delegate),
       visibility_(VISIBILITY_HIDDEN),
-      layer_(new ui::Layer(desktop->compositor())),
       needs_paint_all_(true),
       parent_(NULL),
       id_(-1) {
@@ -28,6 +26,10 @@ Window::Window(Desktop* desktop)
 Window::~Window() {
 }
 
+void Window::Init() {
+  layer_.reset(new ui::Layer(Desktop::GetInstance()->compositor()));
+}
+
 void Window::SetVisibility(Visibility visibility) {
   if (visibility_ == visibility)
     return;
@@ -51,12 +53,19 @@ void Window::SchedulePaint(const gfx::Rect& bounds) {
 
 void Window::SetCanvas(const SkCanvas& canvas, const gfx::Point& origin) {
   // TODO: figure out how this is going to work when animating the layer. In
-  // particular if we're animating the size then the underyling Texture is going
+  // particular if we're animating the size then the underlying Texture is going
   // to be unhappy if we try to set a texture on a size bigger than the size of
   // the texture.
   layer_->SetCanvas(canvas, origin);
 }
 
+void Window::SetParent(Window* parent) {
+  if (parent)
+    parent->AddChild(this);
+  else
+    Desktop::GetInstance()->window()->AddChild(this);
+}
+
 void Window::DrawTree() {
   UpdateLayerCanvas();
   Draw();
@@ -96,8 +105,13 @@ void Window::UpdateLayerCanvas() {
   dirty_rect_.SetRect(0, 0, 0, 0);
   if (dirty_rect.IsEmpty())
     return;
-  if (delegate_)
-    delegate_->OnPaint(dirty_rect);
+  if (delegate_) {
+    scoped_ptr<gfx::Canvas> canvas(gfx::Canvas::CreateCanvas(
+        dirty_rect.width(), dirty_rect.height(), false));
+    canvas->TranslateInt(dirty_rect.x(), dirty_rect.y());
+    delegate_->OnPaint(canvas.get());
+    SetCanvas(*canvas->AsCanvasSkia(), bounds().origin());
+  }
 }
 
 void Window::Draw() {

aura/window.h

@@ -10,7 +10,6 @@
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
-#include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/rect.h"
 
 class SkCanvas;
@@ -42,14 +41,17 @@ class Window {
     VISIBILITY_SHOWN_NO_INPUT = 3,
   };
 
-  explicit Window(Desktop* desktop);
+  explicit Window(WindowDelegate* delegate);
   ~Window();
 
-  void set_delegate(WindowDelegate* d) { delegate_ = d; }
+  void Init();
 
   int id() const { return id_; }
   void set_id(int id) { id_ = id; }
 
+  ui::Layer* layer() { return layer_.get(); }
+  const ui::Layer* layer() const { return layer_.get(); }
+
   // Changes the visibility of the window.
   void SetVisibility(Visibility visibility);
   Visibility visibility() const { return visibility_; }
@@ -64,6 +66,11 @@ class Window {
   // Sets the contents of the window.
   void SetCanvas(const SkCanvas& canvas, const gfx::Point& origin);
 
+  // Sets the parent window of the window. If NULL, the window is parented to
+  // the desktop's window.
+  void SetParent(Window* parent);
+  Window* parent() { return parent_; }
+
   // Draw the window and its children.
   void DrawTree();
 
@@ -72,7 +79,6 @@ class Window {
   //             should change this.
   void AddChild(Window* child);
   void RemoveChild(Window* child);
-  Window* parent() { return parent_; }
 
   // Handles a mouse event. Returns true if handled.
   bool OnMouseEvent(const MouseEvent& event);

aura/window_delegate.h

@@ -6,14 +6,17 @@
 #define AURA_WINDOW_DELEGATE_H_
 #pragma once
 
+namespace gfx {
+class Canvas;
+}
+
 namespace aura {
 
 // Delegate interface for aura::Window.
 class WindowDelegate {
  public:
-  // Asks the delegate to paint to the window. The delegate should call back
-  // to the window with SetCanvas.
-  virtual void OnPaint(const gfx::Rect& bounds) = 0;
+  // Asks the delegate to paint window contents into the supplied canvas.
+   virtual void OnPaint(gfx::Canvas* canvas) = 0;
 
  protected:
   virtual ~WindowDelegate() {}

ui/gfx/canvas_skia.cc

@@ -366,7 +366,7 @@ Canvas* Canvas::CreateCanvas(int width, int height, bool is_opaque) {
   return new CanvasSkia(width, height, is_opaque);
 }
 
-#if defined(OS_WIN)
+#if defined(OS_WIN) && !defined(USE_AURA)
 // TODO(beng): move to canvas_win.cc, etc.
 class CanvasPaintWin : public CanvasSkiaPaint, public CanvasPaint {
  public:
@@ -388,7 +388,7 @@ class CanvasPaintWin : public CanvasSkiaPaint, public CanvasPaint {
 #endif
 
 CanvasPaint* CanvasPaint::CreateCanvasPaint(gfx::NativeView view) {
-#if defined(OS_WIN)
+#if defined(OS_WIN) && !defined(USE_AURA)
   return new CanvasPaintWin(view);
 #else
   return NULL;

ui/gfx/screen_aura.cc

+// Copyright (c) 2011 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/gfx/screen.h"
+
+#include <windows.h>
+
+#include "base/logging.h"
+
+namespace gfx {
+
+// static
+gfx::Point Screen::GetCursorScreenPoint() {
+#if defined(OS_WIN)
+  POINT pt;
+  GetCursorPos(&pt);
+  return gfx::Point(pt);
+#endif
+}
+
+// static
+gfx::Rect Screen::GetMonitorWorkAreaNearestWindow(gfx::NativeWindow window) {
+  NOTIMPLEMENTED();
+  return gfx::Rect();
+}
+
+// static
+gfx::Rect Screen::GetMonitorAreaNearestWindow(gfx::NativeWindow window) {
+  NOTIMPLEMENTED();
+  return gfx::Rect();
+}
+
+static gfx::Rect GetMonitorAreaOrWorkAreaNearestPoint(const gfx::Point& point,
+                                                      bool work_area) {
+  NOTIMPLEMENTED();
+  return gfx::Rect();
+}
+
+// static
+gfx::Rect Screen::GetMonitorWorkAreaNearestPoint(const gfx::Point& point) {
+  return GetMonitorAreaOrWorkAreaNearestPoint(point, true);
+}
+
+// static
+gfx::Rect Screen::GetMonitorAreaNearestPoint(const gfx::Point& point) {
+  return GetMonitorAreaOrWorkAreaNearestPoint(point, false);
+}
+
+gfx::NativeWindow Screen::GetWindowAtCursorScreenPoint() {
+  NOTIMPLEMENTED();
+  return NULL;
+}
+
+}  // namespace gfx

ui/ui.gyp

@@ -265,6 +265,7 @@
         'gfx/render_text_win.cc',
         'gfx/render_text_win.h',
         'gfx/screen.h',
+        'gfx/screen_aura.cc',
         'gfx/screen_gtk.cc',
         'gfx/screen_wayland.cc',
         'gfx/screen_win.cc',
@@ -285,6 +286,11 @@
         'gfx/transform.cc',
       ],
       'conditions': [
+        ['use_aura==1', {
+          'sources/': [
+            ['exclude', 'gfx/screen_win.cc'],
+          ],
+        }],
         ['toolkit_uses_gtk == 1', {
           'dependencies': [
             # font_gtk.cc uses fontconfig.

views/DEPS

 include_rules = [
+  "+aura",
   "+grit/ui_resources.h",
   "+grit/ui_resources_standard.h",
   "+grit/ui_resources_large.h",

views/aura_desktop/aura_desktop_main.cc

+// Copyright (c) 2011 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 "aura/desktop.h"
+#include "aura/desktop_host.h"
+#include "aura/window.h"
+#include "aura/window_delegate.h"
+#include "base/at_exit.h"
+#include "base/command_line.h"
+#include "base/i18n/icu_util.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/message_loop.h"
+#include "third_party/skia/include/core/SkXfermode.h"
+#include "ui/base/resource/resource_bundle.h"
+#include "ui/base/ui_base_paths.h"
+#include "ui/gfx/canvas.h"
+#include "ui/gfx/canvas_skia.h"
+#include "ui/gfx/rect.h"
+#include "views/widget/widget.h"
+
+namespace {
+
+// Trivial WindowDelegate implementation that draws a colored background.
+class DemoWindowDelegate : public aura::WindowDelegate {
+ public:
+  explicit DemoWindowDelegate(SkColor color) : color_(color) {}
+
+  virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE {
+    canvas->AsCanvasSkia()->drawColor(color_, SkXfermode::kSrc_Mode);
+  }
+
+ private:
+  SkColor color_;
+
+  DISALLOW_COPY_AND_ASSIGN(DemoWindowDelegate);
+};
+
+class TestView : public views::View {
+ public:
+  TestView() {}
+  virtual ~TestView() {}
+
+ private:
+  // Overridden from views::View:
+  virtual void OnPaint(gfx::Canvas* canvas) {
+    canvas->FillRectInt(SK_ColorYELLOW, 0, 0, width(), height());
+  }
+
+  DISALLOW_COPY_AND_ASSIGN(TestView);
+};
+
+}  // namespace
+
+int main(int argc, char** argv) {
+  CommandLine::Init(argc, argv);
+
+  // The exit manager is in charge of calling the dtors of singleton objects.
+  base::AtExitManager exit_manager;
+
+  ui::RegisterPathProvider();
+  icu_util::Initialize();
+  ResourceBundle::InitSharedInstance("en-US");
+
+#if defined(USE_X11)
+  base::MessagePumpX::DisableGtkMessagePump();
+#endif
+
+  aura::Desktop::GetInstance();
+
+  // Create a hierarchy of test windows.
+  DemoWindowDelegate window_delegate1(SK_ColorBLUE);
+  aura::Window window1(&window_delegate1);
+  window1.set_id(1);
+  window1.Init();
+  window1.SetBounds(gfx::Rect(100, 100, 400, 400), 0);
+  window1.SetVisibility(aura::Window::VISIBILITY_SHOWN);
+  window1.SetParent(NULL);
+
+  DemoWindowDelegate window_delegate2(SK_ColorRED);
+  aura::Window window2(&window_delegate2);
+  window2.set_id(2);
+  window2.Init();
+  window2.SetBounds(gfx::Rect(200, 200, 350, 350), 0);
+  window2.SetVisibility(aura::Window::VISIBILITY_SHOWN);
+  window2.SetParent(NULL);
+
+  DemoWindowDelegate window_delegate3(SK_ColorGREEN);
+  aura::Window window3(&window_delegate3);
+  window3.set_id(3);
+  window3.Init();
+  window3.SetBounds(gfx::Rect(10, 10, 50, 50), 0);
+  window3.SetVisibility(aura::Window::VISIBILITY_SHOWN);
+  window3.SetParent(&window2);
+
+  views::Widget widget;
+  views::Widget::InitParams params(views::Widget::InitParams::TYPE_CONTROL);
+  params.bounds = gfx::Rect(75, 75, 80, 80);
+  params.parent = &window2;
+  widget.Init(params);
+  widget.SetContentsView(new TestView);
+
+  aura::Desktop::GetInstance()->Run();
+  return 0;
+}
+

views/controls/menu/menu_controller.cc

@@ -1748,7 +1748,12 @@ bool MenuController::SelectByChar(char16 character) {
   return false;
 }
 
-#if defined(OS_WIN) && !defined(USE_AURA)
+#if defined(OS_WIN)
+#if defined(USE_AURA)
+void MenuController::RepostEvent(SubmenuView* source,
+                                 const MouseEvent& event) {
+}
+#else
 void MenuController::RepostEvent(SubmenuView* source,
                                  const MouseEvent& event) {
   if (!state_.item) {
@@ -1815,7 +1820,8 @@ void MenuController::RepostEvent(SubmenuView* source,
     }
   }
 }
-#endif
+#endif  // !defined(USE_AURA)
+#endif  // defined(OS_WIN)
 
 void MenuController::SetDropMenuItem(
     MenuItemView* new_target,

views/focus/accelerator_handler_aura.cc

+// Copyright (c) 2011 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 "views/focus/accelerator_handler.h"
+
+namespace views {
+
+AcceleratorHandler::AcceleratorHandler() {
+}
+
+bool AcceleratorHandler::Dispatch(const MSG& msg) {
+#if defined(OS_WIN)
+  TranslateMessage(&msg);
+  DispatchMessage(&msg);
+#endif
+  return true;
+}
+
+}  // namespace views

views/view_aura.cc

+// Copyright (c) 2011 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 "views/view.h"
+
+namespace views {
+
+gfx::NativeViewAccessible View::GetNativeViewAccessible() {
+  return NULL;
+}
+
+int View::GetHorizontalDragThreshold() {
+  return 0;
+}
+
+int View::GetVerticalDragThreshold() {
+  return 0;
+}
+
+}  // namespace views

views/views.gyp

@@ -242,6 +242,7 @@
         'events/event_utils_win.h',
         'events/event_x.cc',
         'focus/accelerator_handler.h',
+        'focus/accelerator_handler_aura.cc',
         'focus/accelerator_handler_gtk.cc',
         'focus/accelerator_handler_touch.cc',
         'focus/accelerator_handler_win.cc',
@@ -310,6 +311,7 @@
         'touchui/touch_selection_controller_impl.h',
         'view.cc',
         'view.h',
+        'view_aura.cc',
         'view_constants.cc',
         'view_constants.h',
         'view_gtk.cc',
@@ -396,6 +398,16 @@
             'widget/child_window_message_processor.cc',
             'widget/child_window_message_processor.h',
           ],
+          'conditions': [
+            ['OS=="win"', {
+              'sources/': [
+                ['include', 'controls/menu/menu_config_win.cc'],
+                ['include', 'controls/menu/menu_item_view_win.cc'],
+                ['include', 'controls/menu/menu_separator_win.cc'],
+                ['include', 'drag_utils_win.cc'],
+              ],
+            }],
+          ],
         }],
         ['toolkit_uses_gtk == 1', {
           'dependencies': [
@@ -766,7 +778,50 @@
         }],
       ],
     },
-
-
+  ],
+  'conditions': [
+    ['use_aura==1', {
+      'targets': [
+        {
+          'target_name': 'views_aura_desktop',
+          'type': 'executable',
+          'dependencies': [
+            '../base/base.gyp:base',
+            '../base/base.gyp:base_i18n',
+            '../skia/skia.gyp:skia',
+            '../third_party/icu/icu.gyp:icui18n',
+            '../third_party/icu/icu.gyp:icuuc',
+            '../ui/ui.gyp:gfx_resources',
+            '../ui/ui.gyp:ui',
+            '../ui/ui.gyp:ui_resources',
+            '../ui/ui.gyp:ui_resources_standard',
+            'views',
+            'views_desktop_lib',
+          ],
+          'include_dirs': [
+            '..',
+          ],
+          'sources': [
+            'aura_desktop/aura_desktop_main.cc',
+            '<(SHARED_INTERMEDIATE_DIR)/ui/gfx/gfx_resources.rc',
+            '<(SHARED_INTERMEDIATE_DIR)/ui/ui_resources/ui_resources.rc',
+            '<(SHARED_INTERMEDIATE_DIR)/ui/ui_resources_standard/ui_resources_standard.rc',
+          ],
+          'conditions': [
+            ['OS=="win"', {
+              'link_settings': {
+                'libraries': [
+                  '-limm32.lib',
+                  '-loleacc.lib',
+                ]
+              },
+              'include_dirs': [
+                '<(DEPTH)/third_party/wtl/include',
+              ],
+            }],
+          ],
+        },
+      ],
+    }],      
   ],
 }

views/widget/native_widget_aura.h

@@ -6,11 +6,13 @@
 #define VIEWS_WIDGET_NATIVE_WIDGET_AURA_H_
 #pragma once
 
+#include "aura/window_delegate.h"
 #include "views/widget/native_widget_private.h"
 
 namespace views {
 
-class NativeWidgetAura : public internal::NativeWidgetPrivate {
+class NativeWidgetAura : public internal::NativeWidgetPrivate,
+                         public aura::WindowDelegate {
  public:
   explicit NativeWidgetAura(internal::NativeWidgetDelegate* delegate);
   virtual ~NativeWidgetAura();
@@ -97,7 +99,14 @@ class NativeWidgetAura : public internal::NativeWidgetPrivate {
       const Widget* ancestor, gfx::Point* point) const OVERRIDE;
   virtual void DispatchKeyEventPostIME(const KeyEvent& key) OVERRIDE;
 
+  // Overridden from aura::WindowDelegate:
+  virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
+
  private:
+  internal::NativeWidgetDelegate* delegate_;
+
+  aura::Window* window_;
+
   DISALLOW_COPY_AND_ASSIGN(NativeWidgetAura);
 };