Introduce WindowStateDelegate::ToggleFullscreen

ash/wm/window_state_delegate.cc

Index: ash/wm/window_state_delegate.cc
diff --git a/ash/wm/window_state_delegate.cc b/ash/wm/window_state_delegate.cc
new file mode 100644
index 0000000000000000000000000000000000000000..00040735ea4d4d7fb84ddb47fe2bba1ac0efe764
--- /dev/null
+++ b/ash/wm/window_state_delegate.cc
@@ -0,0 +1,21 @@
+// Copyright 2013 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 "ash/wm/window_state_delegate.h"
+
+namespace ash {
+namespace wm {
+
+WindowStateDelegate::WindowStateDelegate() {
+}
+
+WindowStateDelegate::~WindowStateDelegate() {
+}
+
+bool WindowStateDelegate::ToggleFullscreen(WindowState* window_state) {
+  return false;
+}
+
+}  // namespace wm
+}  // namespace ash