The lifetime of the WasmInterpreter is managed by the GC. However, we
did not tell the GC the amount of memory consumed by the interpreter.
Therefore it was possible to fill up memory with instances of the
interpreter without triggering a GC to free memory. With this CL we pass
the size of the stack as an estimate for the size of the interpreter. At
least in the fuzzer the stack is the dominating factor for memory
consumption.

R=clemensh@chromium.org

Bug: chromium:863198
Change-Id: Ic5cb0bd364500bcff793a1fd53d2d0113196dfe2
Reviewed-on: https://chromium-review.googlesource.com/1156385Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54810}