[gears-eng] Re: a small code review (8175690) Enable the leak-counting GUI on IE, and also plug

[Nigel Tao]

For completeness, here's the before / after on tester/gui.html. Before:

Google Gears is leaking memory. Known leaks include 8 objects:
    2 DocumentJsRunner
    2 ModuleEnvironment
    2 ModuleImplBaseClass
    2 ModuleWrapper

After: nothing.