Enable WebUI ScreenLocker for aura by abstracting lock window.

chrome/browser/chromeos/login/lock_window_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 "chrome/browser/chromeos/login/lock_window_aura.h"
+
+#include "ui/aura/desktop.h"
+#include "ui/aura/window.h"
+#include "ui/aura_shell/shell.h"
+#include "ui/aura_shell/shell_window_ids.h"
+
+namespace chromeos {
+
+LockWindow* LockWindow::Create() {
+  return new LockWindowAura();
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// LockWindow implementation:
+void LockWindowAura::Grab(DOMView* dom_view) {
+  // We already have grab from the lock screen container, just call the ready
+  // callback immediately.
+  if (observer_)
+    observer_->OnLockWindowReady();
+}
+
+views::Widget* LockWindowAura::GetWidget() {
+  return this;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// LockWindowAura private:
+LockWindowAura::LockWindowAura() {
+  Init();
+}
+
+LockWindowAura::~LockWindowAura() {
+}
+
+void LockWindowAura::Init() {
+  views::Widget::InitParams params(
+      views::Widget::InitParams::TYPE_WINDOW_FRAMELESS);
+  params.bounds = gfx::Rect(aura::Desktop::GetInstance()->GetHostSize());
+  // TODO(flackr): Use a property to specify this container rather than
+  // depending on shell implementation.
+  params.parent = aura_shell::Shell::GetInstance()->GetContainer(
+      aura_shell::internal::kShellWindowId_LockScreenContainer);
+  views::Widget::Init(params);
+}
+
+}  // namespace chromeos