arc: Support pinned apps across Arc-enabled and Arc-disabled platforms.

chrome/browser/ui/app_list/app_list_syncable_service_factory.cc

Index: chrome/browser/ui/app_list/app_list_syncable_service_factory.cc
diff --git a/chrome/browser/ui/app_list/app_list_syncable_service_factory.cc b/chrome/browser/ui/app_list/app_list_syncable_service_factory.cc
index 9d89d8b3688a90334ad6da86867c4f3f491a5d00..7d3509bdc889ea2bfdaa8590bf50c438e5071cfc 100644
--- a/chrome/browser/ui/app_list/app_list_syncable_service_factory.cc
+++ b/chrome/browser/ui/app_list/app_list_syncable_service_factory.cc
@@ -25,6 +25,10 @@
 
 namespace app_list {
 
+namespace {
+bool use_in_testing = false;
+}
+
 // static
 AppListSyncableService* AppListSyncableServiceFactory::GetForProfile(
     Profile* profile) {
@@ -51,6 +55,11 @@ std::unique_ptr<KeyedService> AppListSyncableServiceFactory::BuildInstanceFor(
       profile, extensions::ExtensionSystem::Get(profile)));
 }
 
+// static
+void AppListSyncableServiceFactory::SetUseInTesting() {
+  use_in_testing = true;
+}
+
 AppListSyncableServiceFactory::AppListSyncableServiceFactory()
     : BrowserContextKeyedServiceFactory(
         "AppListSyncableService",
@@ -97,7 +106,7 @@ bool AppListSyncableServiceFactory::ServiceIsCreatedWithBrowserContext() const {
 }
 
 bool AppListSyncableServiceFactory::ServiceIsNULLWhileTesting() const {
-  return true;
+  return !use_in_testing;
 }
 
 }  // namespace app_list