Introduce chrome.shell.createWindow stub API for app_shell

apps/shell/renderer/shell_custom_bindings.h

+// Copyright 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.
+
+#ifndef APPS_SHELL_RENDERER_SHELL_CUSTOM_BINDINGS_H_
+#define APPS_SHELL_RENDERER_SHELL_CUSTOM_BINDINGS_H_
+
+#include "extensions/renderer/object_backed_native_handler.h"
+
+namespace apps {
+
+// Implements custom bindings for the chrome.shell API.
+class ShellCustomBindings : public extensions::ObjectBackedNativeHandler {
+ public:
+  ShellCustomBindings(extensions::ScriptContext* context);
+
+ private:
+  void GetView(const v8::FunctionCallbackInfo<v8::Value>& args);
+
+  DISALLOW_COPY_AND_ASSIGN(ShellCustomBindings);
+};
+
+}  // namespace apps
+
+#endif  // APPS_SHELL_RENDERER_SHELL_CUSTOM_BINDINGS_H_