[base] Add iterator_range helper class.

TEST=unittests
R=titzer@chromium.org

Review URL: https://codereview.chromium.org/810683003

Cr-Commit-Position: refs/heads/master@{#25834}
Log V8 version in profiler log file

Patch from issue 800293002 authored by ben@strongloop.com

TBR=yangguo@chromium.org

Review URL: https://codereview.chromium.org/806143002

Cr-Commit-Position: refs/heads/master@{#25835}
[turbofan] Always align loop headers at 16-byte boundaries.

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/811713002

Cr-Commit-Position: refs/heads/master@{#25836}