Add caching for apps list search results.

chrome/browser/ui/app_list/search/common/webservice_cache_factory.cc

+// Copyright 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/ui/app_list/search/common/webservice_cache_factory.h"
+
+#include "base/memory/singleton.h"
+#include "chrome/browser/ui/app_list/search/common/webservice_cache.h"
+#include "components/browser_context_keyed_service/browser_context_dependency_manager.h"
+
+namespace app_list {
+
+// static
+WebserviceCacheFactory* WebserviceCacheFactory::GetInstance() {
+  return Singleton<WebserviceCacheFactory>::get();
+}
+
+// static
+WebserviceCache* WebserviceCacheFactory::GetForBrowserContext(
+    content::BrowserContext* context) {
+  return static_cast<WebserviceCache*>(
+      GetInstance()->GetServiceForBrowserContext(context, true));
+}
+
+WebserviceCacheFactory::WebserviceCacheFactory()
+    : BrowserContextKeyedServiceFactory(
+          "app_list::WebserviceCache",
+          BrowserContextDependencyManager::GetInstance()) {}
+
+WebserviceCacheFactory::~WebserviceCacheFactory() {}
+
+BrowserContextKeyedService* WebserviceCacheFactory::BuildServiceInstanceFor(
+    content::BrowserContext* context) const {
+  return new WebserviceCache(context);
+}
+
+}  // namespace app_list