Bug 778433 - Raise ShutdownLeakLogger's MAX_LEAK_COUNT to something less annoying, until bug 728294 lands; r=me DONTBUILD on a CLOSED TREE

build/automationutils.py

@@ -426,7 +426,7 @@ class ShutdownLeakLogger(object):
   DOM windows (that are still around after test suite shutdown, despite running
   the GC) to the tests that created them and prints leak statistics.
   """
-  MAX_LEAK_COUNT = 3
+  MAX_LEAK_COUNT = 4
 
   def __init__(self, logger):
     self.logger = logger