[sync] skeleton implementation of TypedURLSyncBridge

ios/chrome/browser/sync/ios_chrome_sync_client.mm

Index: ios/chrome/browser/sync/ios_chrome_sync_client.mm
diff --git a/ios/chrome/browser/sync/ios_chrome_sync_client.mm b/ios/chrome/browser/sync/ios_chrome_sync_client.mm
index 8d7d4a566576ad89405ed7eabfc4f9b9fea8d4bf..ff396b5a1abca03e06ea149700f91d2bd1243969 100644
--- a/ios/chrome/browser/sync/ios_chrome_sync_client.mm
+++ b/ios/chrome/browser/sync/ios_chrome_sync_client.mm
@@ -23,6 +23,8 @@
 #include "components/dom_distiller/core/dom_distiller_service.h"
 #include "components/history/core/browser/history_model_worker.h"
 #include "components/history/core/browser/history_service.h"
+#include "components/history/core/browser/typed_url_sync_bridge.h"
+#include "components/history/core/browser/typed_url_syncable_service.h"
 #include "components/invalidation/impl/profile_invalidation_provider.h"
 #include "components/keyed_service/core/service_access_type.h"
 #include "components/password_manager/core/browser/password_store.h"
@@ -353,6 +355,13 @@ IOSChromeSyncClient::GetSyncBridgeForModelType(syncer::ModelType type) {
       return autofill::AutocompleteSyncBridge::FromWebDataService(
                  web_data_service_.get())
           ->AsWeakPtr();
+    case syncer::TYPED_URLS: {
+      history::HistoryService* history =
+          ios::HistoryServiceFactory::GetForBrowserState(
+              browser_state_, ServiceAccessType::EXPLICIT_ACCESS);
+      return history ? history->GetTypedURLSyncBridge()->AsWeakPtr()
+                     : base::WeakPtr<syncer::ModelTypeSyncBridge>();
+    }
     default:
       NOTREACHED();
       return base::WeakPtr<syncer::ModelTypeSyncBridge>();