Move SystemIndicator parsing out of Extension class

chrome/browser/extensions/api/system_indicator/system_indicator_api.cc

+// Copyright (c) 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 "chrome/browser/extensions/api/system_indicator/system_indicator_api.h"
+
+#include "base/lazy_instance.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/common/extensions/api/system_indicator/system_indicator_handler.h"
+
+namespace extensions {
+
+SystemIndicatorAPI::SystemIndicatorAPI(Profile* profile) {
+  (new SystemIndicatorHandler)->Register();
+}
+
+SystemIndicatorAPI::~SystemIndicatorAPI() {
+}
+
+static base::LazyInstance<ProfileKeyedAPIFactory<SystemIndicatorAPI> >
+    g_factory = LAZY_INSTANCE_INITIALIZER;
+
+// static
+ProfileKeyedAPIFactory<SystemIndicatorAPI>*
+SystemIndicatorAPI::GetFactoryInstance() {
+  return &g_factory.Get();
+}
+
+}  // namespace extensions