Fix typo in microsecond clock for NS2V8.
Resolve discrepancy between depth calculations in NS2Squeak and NS2V8.
Pass a MixinMirror rather than a ClassDeclarationMirror into incremental scope building.
Include slots and methods in incremental scope builder. Still incorrect on NS2V8 when the target of an implicit receiver send is a class accessor.
catch: -> whenSmashed: