Simulators use separate stacks for C++ and JS. JS stack overflow checks
are performed whenever a JS function is called. However, it can be the
case that the C++ stack grows faster than the JS stack, resulting in an
overflow there. Add a check here to make that less likely.

BUG=chromium:604376
R=bmeurer@chromium.org, yangguo@chromium.org

Review-Url: https://codereview.chromium.org/2151663003
Cr-Commit-Position: refs/heads/master@{#37749}