DevTooos: Profiler domain refactoring: Make deoptReason and positionTicks fields optional.

BUG=635947

Review-Url: https://codereview.chromium.org/2262303002
Cr-Original-Commit-Position: refs/heads/master@{#413580}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: b7358341b5ef6110ff7fedaf3cb5f978deb379ae
2 files changed