Back out 0bbb5cacadaf (bug 694254) for timing out on Windows
Bug 850523 (part 1) - Add a "js-main-runtime-temporary-peak" memory reporter.  r=wmccloskey,jlebar.

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extra : rebase_source : d183213c48b9d07fb62fce830998bcb8bb044f47
Bug 847099 - Intermittent test_readonly_lockedfiles.html | Assertion count {2,4} is greater than expected range (Didn't find the locked file we were looking for!: 'mLockedFileQueues.Length()...) followed by a timeout in test_add_put.html et al (bug 783913). r=bent