It was too early to remove SharedFunctionInfo::kCompilerHintsSize.

TBR=jkummerow@chromium.org

Bug: v8:6470
Change-Id: I6d4ff1399155ebb587896cc2b1f117df14bea082
Reviewed-on: https://chromium-review.googlesource.com/529130
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45827}