app_shell: Initial skeleton of a GCD target device setup API

extensions/shell/browser/api/shell_gcd/shell_gcd_api.cc

+// 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.
+
+#include "extensions/shell/browser/api/shell_gcd/shell_gcd_api.h"
+
+#include "base/values.h"
+#include "extensions/shell/common/api/shell_gcd.h"
+
+namespace shell_gcd = extensions::shell::api::shell_gcd;
+
+namespace extensions {
+
+ShellGcdGetSetupStatusFunction::ShellGcdGetSetupStatusFunction() {
+}
+
+ShellGcdGetSetupStatusFunction::~ShellGcdGetSetupStatusFunction() {
+}
+
+ExtensionFunction::ResponseAction ShellGcdGetSetupStatusFunction::Run() {
+  // TODO(jamescook): Implement this.
+  shell_gcd::SetupStatus status = shell_gcd::SETUP_STATUS_COMPLETED;
+  return RespondNow(
+      ArgumentList(shell_gcd::GetSetupStatus::Results::Create(status)));
+}
+
+}  // namespace extensions