Move Icons out of Extension class

chrome/browser/extensions/api/icons/icons_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/icons/icons_api.h"
+
+#include "base/lazy_instance.h"
+#include "base/memory/linked_ptr.h"
+#include "chrome/common/extensions/api/icons/icons_handler.h"
+#include "chrome/common/extensions/extension_manifest_constants.h"
+#include "chrome/common/extensions/manifest_handler.h"
+
+namespace extensions {
+
+static base::LazyInstance<ProfileKeyedAPIFactory<IconsAPI> >
+    g_factory = LAZY_INSTANCE_INITIALIZER;
+
+// static
+ProfileKeyedAPIFactory<IconsAPI>* IconsAPI::GetFactoryInstance() {
+  return &g_factory.Get();
+}
+
+IconsAPI::IconsAPI(Profile* profile) {
+  ManifestHandler::Register(extension_manifest_keys::kIcons,
+                            make_linked_ptr(new IconsHandler));
+}
+
+IconsAPI::~IconsAPI() {
+}
+
+}  // namespace extensions