Detect when chrome is shutting down and don't SendFinacialPing

chrome/browser/rlz/rlz.h

Index: chrome/browser/rlz/rlz.h
diff --git a/chrome/browser/rlz/rlz.h b/chrome/browser/rlz/rlz.h
index 23075e1a7673f32a0e63192ece8e333fdcf00e9c..5e54d29a2dbebbd9d5fba43fbcac4b703037820d 100644
--- a/chrome/browser/rlz/rlz.h
+++ b/chrome/browser/rlz/rlz.h
@@ -87,6 +87,9 @@ class RLZTracker : public content::NotificationObserver {
   // This method is public for use by the Singleton class.
   static RLZTracker* GetInstance();
 
+  // Called when Chrome is shutting down.
+  static void PostMainMessageLoopRun();

[Roger Tawa OOO till Jul 10th, 2013/04/29 16:56:45]

If we do need this method, better to rename this something like Shutdown(). 
PostMainMessageLoopRun() is descriptive of where this is currently called from
the chrome code today, not really what the function does.

[bcwhite, 2013/04/29 19:21:34]

I was trying to keep the name consistent with every other shutdown method, but
it doesn't matter as I've gone with the existing method.

+
   // Enables zero delay for InitRlzFromProfileDelayed. For testing only.
   static void EnableZeroDelayForTesting();