Bug 977757 - 1/3 - make nsCSSProps::EnabledState a bitfield - r=dbaron,bz
Bug 977757 - 2/3 - add nsCSSProps::eEnabledInChromeOrCertifiedApp bit, and use it for will-change - r=dbaron,bz
Bug 977757 - 3/3 - Expose CSS_PROPERTY_ALWAYS_ENABLED_IN_CHROME_OR_CERTIFIED_APP properties in JS bindings as needed - r=bz
Bug 982988 - Disable browser_bug415846.js for failing without changing Firefox code
Merge m-c to inbound