[Sync] Add tests for migration triggered by notifications

chrome/browser/automation/testing_automation_provider.cc

Index: chrome/browser/automation/testing_automation_provider.cc
diff --git a/chrome/browser/automation/testing_automation_provider.cc b/chrome/browser/automation/testing_automation_provider.cc
index 55021e10af6c459be5bd85c710392fe11b700999..30d1d3e90f6af07c10700baa966ed64d4184cb47 100644
--- a/chrome/browser/automation/testing_automation_provider.cc
+++ b/chrome/browser/automation/testing_automation_provider.cc
@@ -4629,8 +4629,7 @@ void TestingAutomationProvider::SignInToSync(Browser* browser,
   }
   if (sync_waiter_.get() == NULL) {
     sync_waiter_.reset(new ProfileSyncServiceHarness(
-        browser->profile(), username, password,
-        true /* expected_notifications_enabled */));
+        browser->profile(), username, password));
   } else {
     sync_waiter_->SetCredentials(username, password);
   }