Refactor extension app icon.

chrome/browser/extensions/chrome_app_icon_service_factory.cc

+// Copyright 2017 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/chrome_app_icon_service_factory.h"
+
+#include "chrome/browser/extensions/chrome_app_icon_service.h"
+#include "chrome/browser/profiles/incognito_helpers.h"
+#include "components/keyed_service/content/browser_context_dependency_manager.h"
+#include "extensions/browser/extension_registry_factory.h"
+
+namespace extensions {
+
+// static
+ChromeAppIconService* ChromeAppIconServiceFactory::GetForBrowserContext(
+    content::BrowserContext* context) {
+  return static_cast<ChromeAppIconService*>(
+      GetInstance()->GetServiceForBrowserContext(context, true));
+}
+
+// static
+ChromeAppIconServiceFactory* ChromeAppIconServiceFactory::GetInstance() {
+  return base::Singleton<ChromeAppIconServiceFactory>::get();
+}
+
+ChromeAppIconServiceFactory::ChromeAppIconServiceFactory()
+    : BrowserContextKeyedServiceFactory(
+          "ChromeAppIconService",
+          BrowserContextDependencyManager::GetInstance()) {
+  DependsOn(ExtensionRegistryFactory::GetInstance());

[msw, 2017/05/08 19:59:54]

Does this also depend on some similar arc component?

[khmel, 2017/05/09 00:05:05]

No, ChromeAppIconService may work without ArcAppListPrefs (actually
ArcAppListPrefs is optional  and does not exist in many cases, for example
secondary user profile)

+}
+
+ChromeAppIconServiceFactory::~ChromeAppIconServiceFactory() = default;
+
+KeyedService* ChromeAppIconServiceFactory::BuildServiceInstanceFor(
+    content::BrowserContext* context) const {
+  return new ChromeAppIconService(context);
+}
+
+content::BrowserContext* ChromeAppIconServiceFactory::GetBrowserContextToUse(
+    content::BrowserContext* context) const {
+  return chrome::GetBrowserContextRedirectedInIncognito(context);
+}
+
+}  // namespace extensions