[Sync] Rename ModelTypeService to ModelTypeSyncBridge.

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 ae39fa256dcdd515f80cac7e2837327eb717cff7..6a777b9274de6ce187be107dcd1536f5c64b3a2c 100644
--- a/ios/chrome/browser/sync/ios_chrome_sync_client.mm
+++ b/ios/chrome/browser/sync/ios_chrome_sync_client.mm
@@ -327,8 +327,8 @@ IOSChromeSyncClient::GetSyncableServiceForType(syncer::ModelType type) {
   }
 }
 
-base::WeakPtr<syncer::ModelTypeService>
-IOSChromeSyncClient::GetModelTypeServiceForType(syncer::ModelType type) {
+base::WeakPtr<syncer::ModelTypeSyncBridge>
+IOSChromeSyncClient::GetSyncBridgeForModelType(syncer::ModelType type) {
   switch (type) {
     case syncer::DEVICE_INFO:
       return IOSChromeProfileSyncServiceFactory::GetForBrowserState(
@@ -337,7 +337,7 @@ IOSChromeSyncClient::GetModelTypeServiceForType(syncer::ModelType type) {
           ->AsWeakPtr();
     default:
       NOTREACHED();
-      return base::WeakPtr<syncer::ModelTypeService>();
+      return base::WeakPtr<syncer::ModelTypeSyncBridge>();
   }
 }