Rolling v8/base/trace_event/common to 315bf1e2d45be7d53346c31cfcc37424a32c30c8

Rolling v8/build to 47d75963ee42a9b9688e4f85c097b3a15d4f2bb2

Rolling v8/buildtools to 60f7f9a8b421ebf9a46041dfa2ff11c0fe59c582

Rolling v8/tools/mb to 1815b6867db701b1bba1c223e4f67811196122ea

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

Review-Url: https://codereview.chromium.org/2168733003
Cr-Commit-Position: refs/heads/master@{#37917}