Update V8 to version 4.7.21.
commit28beaa15894779c747e6c6193b988b74a9b71289
authorv8-autoroll <v8-autoroll@chromium.org>
Wed, 2 Sep 2015 06:09:12 +0000 (1 23:09 -0700)
committerCommit bot <commit-bot@chromium.org>
Wed, 2 Sep 2015 06:09:45 +0000 (2 06:09 +0000)
tree25e561f4e490394a647e512c303062aef75215d7
parente3237bbb682e52f92d5bd18dcab672677e4e3bc4
Update V8 to version 4.7.21.

Summary of changes available at:
https://chromium.googlesource.com/v8/v8/+log/351abe0f..dbb82327

Please follow these instructions for assigning/CC'ing issues:
https://code.google.com/p/v8-wiki/wiki/TriagingIssues

Please close rolling in case of a roll revert:
https://v8-roll.appspot.com/

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

Review URL: https://codereview.chromium.org/1303163010

Cr-Commit-Position: refs/heads/master@{#346848}
DEPS