Switch to TimeDelta interfaces for TestTimeouts in sync code.

chrome/browser/sync/glue/session_model_associator.h

Index: chrome/browser/sync/glue/session_model_associator.h
diff --git a/chrome/browser/sync/glue/session_model_associator.h b/chrome/browser/sync/glue/session_model_associator.h
index bfb3271b854a2e60c1c229c9160438436b45a202..e87dd17b1426c9e16579b04a6898b15d0f88d9db 100644
--- a/chrome/browser/sync/glue/session_model_associator.h
+++ b/chrome/browser/sync/glue/session_model_associator.h
@@ -220,9 +220,9 @@ class SessionModelAssociator
   static syncer::ModelType model_type() { return syncer::SESSIONS; }
 
   // Testing only. Will cause the associator to call MessageLoop::Quit()
-  // when a local change is made, or when timeout_milli occurs, whichever is
+  // when a local change is made, or when timeout occurs, whichever is
   // first.
-  void BlockUntilLocalChangeForTest(int64 timeout_milli);
+  void BlockUntilLocalChangeForTest(base::TimeDelta timeout);
 
   // Callback for when the session name has been computed.
   void OnSessionNameInitialized(const std::string& name);