Bug 716647 - Part 4: Recompile on-stack baseline scripts when toggling debug mode. (r=jandem)
Bug 986767 - Fix adjusting stepModeCount when removing a debuggee global from inside the onStep handler. (r=jimb)
Bug 716647 - Part 5: Relax the no on-stack scripts restriction for addDebuggee.
Bug 716647 - Part 5 1/2: Support rematerialized frames in DebugScopes::updateLiveScope.
Bug 716647 - Part 6: Tests.
wip xpcom component for slow script debug button