Version 3.27.1 (based on bleeding_edge revision r21247)

Object.observe: avoid accessing acceptList properties more than once (issue 3315).

Array Iterator prototype should not have a constructor (issue 3293).

Fix typos in unit test for Array.prototype.fill().

Shorten autogenerated error message for functions only (issue 3019, Chromium issue 331971).

Reland "Removed default Isolate." (Chromium issue 359977).

Performance and stability improvements on all platforms.

git-svn-id: https://v8.googlecode.com/svn/trunk@21248 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Merge remote-tracking branch 'upstream/trunk' into trunk