[Sync] SyncEngine 1.5: Fix all backend references in PSS.

chrome/browser/sync/sync_startup_tracker.cc

Index: chrome/browser/sync/sync_startup_tracker.cc
diff --git a/chrome/browser/sync/sync_startup_tracker.cc b/chrome/browser/sync/sync_startup_tracker.cc
index d65454b4058901ffa1042e143634f3c1db2e80e9..459b1775009082d66c13f361d8dc1116eb229c91 100644
--- a/chrome/browser/sync/sync_startup_tracker.cc
+++ b/chrome/browser/sync/sync_startup_tracker.cc
@@ -62,7 +62,7 @@ SyncStartupTracker::SyncServiceState SyncStartupTracker::GetSyncServiceState(
   }
 
   // If the sync backend has started up, notify the callback.

[skym, 2016/12/05 19:38:55]

backend

[maxbogue, 2016/12/05 22:17:10]

Done.

-  if (service->IsBackendInitialized())
+  if (service->IsEngineInitialized())
     return SYNC_STARTUP_COMPLETE;
 
   // If the sync service has some kind of error, report to the user.