app_list: Search result launch history and boost.

chrome/browser/ui/app_list/search/history_factory.cc

Index: chrome/browser/ui/app_list/search/history_factory.cc
diff --git a/chrome/browser/ui/app_list/search/history_factory.cc b/chrome/browser/ui/app_list/search/history_factory.cc
new file mode 100644
index 0000000000000000000000000000000000000000..5d4585ed2db4a8479e94c26f1f43a0a50b5e5aa3
--- /dev/null
+++ b/chrome/browser/ui/app_list/search/history_factory.cc
@@ -0,0 +1,37 @@
+// 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/history_factory.h"
+
+#include "base/memory/singleton.h"
+#include "chrome/browser/ui/app_list/search/history.h"
+#include "components/browser_context_keyed_service/browser_context_dependency_manager.h"
+
+namespace app_list {
+
+// static
+HistoryFactory* HistoryFactory::GetInstance() {
+  return Singleton<HistoryFactory>::get();
+}
+
+// static
+History* HistoryFactory::GetForBrowserContext(
+    content::BrowserContext* context) {
+  return static_cast<History*>(
+      GetInstance()->GetServiceForBrowserContext(context, true));
+}
+
+HistoryFactory::HistoryFactory()
+    : BrowserContextKeyedServiceFactory(
+          "app_list::History",
+          BrowserContextDependencyManager::GetInstance()) {}
+
+HistoryFactory::~HistoryFactory() {}
+
+BrowserContextKeyedService* HistoryFactory::BuildServiceInstanceFor(
+    content::BrowserContext* context) const {
+  return new History(context);
+}
+
+}  // namespace app_list