arc-app-launcher: Minimal support for ARC app launcher.

chrome/browser/ui/app_list/app_list_syncable_service.cc

Index: chrome/browser/ui/app_list/app_list_syncable_service.cc
diff --git a/chrome/browser/ui/app_list/app_list_syncable_service.cc b/chrome/browser/ui/app_list/app_list_syncable_service.cc
index 7ab733bf9cf1cedee37148ac3bdb5fea5f055249..47024d5267ff6eb8f354b8a485586e51177e2071 100644
--- a/chrome/browser/ui/app_list/app_list_syncable_service.cc
+++ b/chrome/browser/ui/app_list/app_list_syncable_service.cc
@@ -38,6 +38,11 @@
 #include "chrome/browser/chromeos/genius_app/app_id.h"
 #endif
 
+#if defined(ENABLE_ARC)
+#include "chrome/browser/ui/app_list/arc_app_item.h"
+#include "chrome/browser/ui/app_list/arc_app_model_builder.h"
+#endif
+
 using syncer::SyncChange;
 
 namespace app_list {
@@ -132,6 +137,10 @@ bool GetAppListItemType(AppListItem* item,
   const char* item_type = item->GetItemType();
   if (item_type == ExtensionAppItem::kItemType) {
     *type = sync_pb::AppListSpecifics::TYPE_APP;
+#if defined(ENABLE_ARC)
+  } else if (item_type == ArcAppItem::kItemType) {
+    *type = sync_pb::AppListSpecifics::TYPE_APP;
+#endif
   } else if (item_type == AppListFolderItem::kItemType) {
     *type = sync_pb::AppListSpecifics::TYPE_FOLDER;
   } else {
@@ -265,14 +274,23 @@ void AppListSyncableService::BuildModel() {
   if (service)
     controller = service->GetControllerDelegate();
   apps_builder_.reset(new ExtensionAppModelBuilder(controller));
+#if defined(ENABLE_ARC)
+  arc_apps_builder_.reset(new ArcAppModelBuilder(controller));
+#endif
   DCHECK(profile_);
   if (app_list::switches::IsAppListSyncEnabled()) {
     VLOG(1) << this << ": AppListSyncableService: InitializeWithService.";
     SyncStarted();
     apps_builder_->InitializeWithService(this, model_.get());
+#if defined(ENABLE_ARC)
+    arc_apps_builder_->InitializeWithService(this, model_.get());
+#endif
   } else {
     VLOG(1) << this << ": AppListSyncableService: InitializeWithProfile.";
     apps_builder_->InitializeWithProfile(profile_, model_.get());
+#if defined(ENABLE_ARC)
+    arc_apps_builder_->InitializeWithProfile(profile_, model_.get());
+#endif
   }
 
   model_pref_updater_.reset(