Implement cycle window forward/backward by keyboard shortcuts.

ui/aura_shell/test/test_shell_delegate.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/aura_shell/test/test_shell_delegate.h"
+
+namespace aura_shell {
+namespace test {
+
+TestShellDelegate::TestShellDelegate() {
+}
+
+TestShellDelegate::~TestShellDelegate() {
+}
+
+void TestShellDelegate::CreateNewWindow() {
+}
+
+views::Widget* TestShellDelegate::CreateStatusArea() {
+  return NULL;
+}
+
+void TestShellDelegate::RequestAppListWidget(
+    const gfx::Rect& bounds,
+    const SetWidgetCallback& callback) {
+}
+
+void TestShellDelegate::LauncherItemClicked(const LauncherItem& item) {
+}
+
+bool TestShellDelegate::ConfigureLauncherItem(LauncherItem* item) {
+  return true;
+}
+
+}  // namespace test
+}  // namespace aura_shell