Plumb a handle to the return value through the hotprofiler.

Summary: Plumb the symbol name through more of the hotprofiler.
Annotate hotprofiler virtual override methods with override keyword as needed.
Reformat as necessary to meet 80 char/line coding style.

Closes #3071

Reviewed By: @markw65

Differential Revision: D1412089

Pulled By: @LiraNuna