Bug 850845 - don't dereference null mCameraHw pointer, r=sotaro

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extra : rebase_source : e41763a11413d1cb66c2e4914a582f35cd9b60f0
Bug 445371 - In </security/*>, "use a xul <stringbundle/> instead of including the strres.js code" r=bsmith
Bug 850559:  Fix tests that call advanceTimeAndRefresh without calling restoreNormalRefresh.  r=vlad
Bug 850559:  Make mochitests check that the test didn't leave the refresh driver under test control.  r=ted