Rollback of r11719, r11717, r11716, r11714, r11700, r11699, r11697, r11695, r11694 in trunk branch.

test/mozilla/testcfg.py

Index: test/mozilla/testcfg.py
diff --git a/test/mozilla/testcfg.py b/test/mozilla/testcfg.py
index e88164d22cf5bb8898e6664ddaa03e2947cebf76..587781d11f24abf747d7948268c66832e924e32c 100644
--- a/test/mozilla/testcfg.py
+++ b/test/mozilla/testcfg.py
@@ -76,7 +76,6 @@ class MozillaTestCase(test.TestCase):
   def GetCommand(self):
     result = self.context.GetVmCommand(self, self.mode) + \
        [ '--expose-gc', join(self.root, 'mozilla-shell-emulation.js') ]
-    result += [ '--es5_readonly' ]  # Temporary hack until we can remove flag
     result += self.framework
     result.append(self.filename)
     return result