If TypeProfile goes out of scope, ScriptData and Entry still rely on
TypeProfiles's type_profile_. Make type_profile_ a shared_ptr owned by all
three classes to prevent use after free.

Bug: v8:5933
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: Ida7d66dadc17a816cf4439a25e6f714edccffa2c
Reviewed-on: https://chromium-review.googlesource.com/659937Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Franziska Hinkelmann <franzih@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48013}

Bug: v8:5933
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: If7d69844a309285ff53edb38688c3c647217fea2
Reviewed-on: https://chromium-review.googlesource.com/657379Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Franziska Hinkelmann <franzih@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47937}