Arrow functions have been enabled by default since the 4.5 branch. Review URL: https://codereview.chromium.org/1373633002 Cr-Commit-Position: refs/heads/master@{#31031}
It was shipped in V8 4.4. Review URL: https://codereview.chromium.org/1273543002 Cr-Commit-Position: refs/heads/master@{#30038}
R=wingo@igalia.com BUG=v8:811 LOG=N Review URL: https://codereview.chromium.org/1212473002 Cr-Commit-Position: refs/heads/master@{#29337}