run aura_demo as a mojo app

mojo/examples/aura_demo/demo_screen.cc

+// Copyright (c) 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 "mojo/examples/aura_demo/demo_screen.h"
+
+#include "ui/gfx/native_widget_types.h"
+#include "ui/gfx/rect_conversions.h"
+
+namespace mojo {
+namespace examples {
+
+// static
+DemoScreen* DemoScreen::Create() {
+  return new DemoScreen(gfx::Rect(0, 0, 800, 600));
+}
+
+DemoScreen::~DemoScreen() {
+}
+
+bool DemoScreen::IsDIPEnabled() {
+  NOTIMPLEMENTED();
+  return true;
+}
+
+gfx::Point DemoScreen::GetCursorScreenPoint() {
+  NOTIMPLEMENTED();
+  return gfx::Point();
+}
+
+gfx::NativeWindow DemoScreen::GetWindowUnderCursor() {
+  return GetWindowAtScreenPoint(GetCursorScreenPoint());
+}
+
+gfx::NativeWindow DemoScreen::GetWindowAtScreenPoint(const gfx::Point& point) {
+  NOTIMPLEMENTED();
+  return NULL;
+}
+
+int DemoScreen::GetNumDisplays() const {
+  return 1;
+}
+
+std::vector<gfx::Display> DemoScreen::GetAllDisplays() const {
+  return std::vector<gfx::Display>(1, display_);
+}
+
+gfx::Display DemoScreen::GetDisplayNearestWindow(
+    gfx::NativeWindow window) const {
+  return display_;
+}
+
+gfx::Display DemoScreen::GetDisplayNearestPoint(const gfx::Point& point) const {
+  return display_;
+}
+
+gfx::Display DemoScreen::GetDisplayMatching(const gfx::Rect& match_rect) const {
+  return display_;
+}
+
+gfx::Display DemoScreen::GetPrimaryDisplay() const {
+  return display_;
+}
+
+void DemoScreen::AddObserver(gfx::DisplayObserver* observer) {
+}
+
+void DemoScreen::RemoveObserver(gfx::DisplayObserver* observer) {
+}
+
+DemoScreen::DemoScreen(const gfx::Rect& screen_bounds) {
+  static int64 synthesized_display_id = 2000;
+  display_.set_id(synthesized_display_id++);
+  display_.SetScaleAndBounds(1.0f, screen_bounds);
+}
+
+}  // namespace examples
+}  // namespace mojo