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

chrome/browser/sync/test/integration/profile_sync_service_harness.h

Index: chrome/browser/sync/test/integration/profile_sync_service_harness.h
diff --git a/chrome/browser/sync/test/integration/profile_sync_service_harness.h b/chrome/browser/sync/test/integration/profile_sync_service_harness.h
index 20de77dc987e1dbfa8398acdb4d9bfaa617456a8..b4b82eb24c0a4f98daa69dad2a1b7ed36558a8a8 100644
--- a/chrome/browser/sync/test/integration/profile_sync_service_harness.h
+++ b/chrome/browser/sync/test/integration/profile_sync_service_harness.h
@@ -82,11 +82,11 @@ class ProfileSyncServiceHarness {
   static bool AwaitQuiescence(
       const std::vector<ProfileSyncServiceHarness*>& clients);
 
-  // Blocks the caller until the sync backend is initialized or some end state
-  // (e.g., auth error) is reached. Returns true if and only if the backend
-  // initialized successfully. See ProfileSyncService's IsBackendInitialized()
-  // method for the definition of backend initialization.
-  bool AwaitBackendInitialization();
+  // Blocks the caller until the sync engine is initialized or some end state
+  // (e.g., auth error) is reached. Returns true if and only if the engine
+  // initialized successfully. See ProfileSyncService's IsEngineInitialized()
+  // method for the definition of engine initialization.
+  bool AwaitEngineInitialization();
 
   // Blocks the caller until sync setup is complete. Returns true if and only
   // if sync setup completed successfully. See syncer::SyncService's