Optimizations are supposed to be disabled in our stack-trace code when
building with VC++. However the check used #if defined(COMPILER_MSVC)
when that is never defined in v8. The correct define in v8 is
V8_CC_MSVC.

R=hablich@chromium.org

Review-Url: https://codereview.chromium.org/2800043003
Cr-Commit-Position: refs/heads/master@{#44621}