Fine tuned availability of hotword plugin.

chrome/browser/ui/app_list/start_page_service_factory.cc

Index: chrome/browser/ui/app_list/start_page_service_factory.cc
diff --git a/chrome/browser/ui/app_list/start_page_service_factory.cc b/chrome/browser/ui/app_list/start_page_service_factory.cc
new file mode 100644
index 0000000000000000000000000000000000000000..0e658664fe6f692600593f7331df56dac55f605d
--- /dev/null
+++ b/chrome/browser/ui/app_list/start_page_service_factory.cc
@@ -0,0 +1,63 @@
+// Copyright 2014 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/start_page_service_factory.h"
+
+#include "base/command_line.h"
+#include "chrome/browser/extensions/extension_system_factory.h"
+#include "chrome/browser/extensions/install_tracker_factory.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/ui/app_list/start_page_service.h"
+#include "chrome/common/chrome_switches.h"
+#include "chrome/common/pref_names.h"
+#include "components/browser_context_keyed_service/browser_context_dependency_manager.h"
+#include "components/user_prefs/pref_registry_syncable.h"
+#include "ui/app_list/app_list_switches.h"
+
+namespace app_list {
+
+// static
+StartPageService* StartPageServiceFactory::GetForProfile(Profile* profile) {
+  if (!CommandLine::ForCurrentProcess()->HasSwitch(
+          ::switches::kShowAppListStartPage) &&
+      !app_list::switches::IsVoiceSearchEnabled()) {
+      return NULL;
+    }
+
+  return static_cast<StartPageService*>(
+      GetInstance()->GetServiceForBrowserContext(profile, true));
+}
+
+// static
+StartPageServiceFactory* StartPageServiceFactory::GetInstance() {
+  return Singleton<StartPageServiceFactory>::get();
+}
+
+StartPageServiceFactory::StartPageServiceFactory()
+    : BrowserContextKeyedServiceFactory(
+        "AppListStartPageService",
+        BrowserContextDependencyManager::GetInstance()) {
+  DependsOn(extensions::ExtensionSystemFactory::GetInstance());
+  DependsOn(extensions::InstallTrackerFactory::GetInstance());
+}
+
+StartPageServiceFactory::~StartPageServiceFactory() {}
+
+BrowserContextKeyedService* StartPageServiceFactory::BuildServiceInstanceFor(
+    content::BrowserContext* context) const {
+  Profile* profile = static_cast<Profile*>(context);
+  return new StartPageService(profile);
+}
+
+void StartPageServiceFactory::RegisterProfilePrefs(
+    user_prefs::PrefRegistrySyncable* registry) {
+#if defined(OS_CHROMEOS)
+  registry->RegisterBooleanPref(
+      prefs::kHotwordAppListEnabled,
+      true,
+      user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
+#endif
+}
+
+}  // namespace app_list