Bug 978229 - Part 0: Rename jsproxy.cpp internal IdToValue to IdToExposableValue. (r=jorendorff)
Bug 978229 - Part 1: Remove IsSealed() from Proxy.[[HasProperty]]. (r=jorendorff)
Bug 978229 - Part 2: Remove IsSealed() from Proxy.[[Delete]]. (r=jorendorff)