Bug 1035454, part 1 - Increase the leak threshold for tab processes. r=khuey

testing/mochitest/mochitest_options.py

@@ -612,7 +612,7 @@ class MochitestOptions(optparse.OptionParser):
 
         options.leakThresholds = {
             "default": options.defaultLeakThreshold,
-            "tab": 10000, # See dependencies of bug 1051230.
+            "tab": 20000, # See dependencies of bug 1051230.
             "geckomediaplugin": 1000, # GMP rarely gets a log, but when it does, it leaks a little.
         }