Rolling v8/base/trace_event/common to ffb39885a2418caa7a6a6652471fe097732675bd

Rolling v8/tools/clang to 8f7a85a108698ce7ed4fe1aa842efa61f195364e

TBR=machenbach@chromium.org,vogelheim@chromium.org,hablich@chromium.org

Review URL: https://codereview.chromium.org/1859433002

Cr-Commit-Position: refs/heads/master@{#35223}