Version 3.26.18 (based on bleeding_edge revision r20821)

Removed Isolate::EnterDefaultIsolate (Chromium issue 359977).

Performance and stability improvements on all platforms.

git-svn-id: https://v8.googlecode.com/svn/trunk@20826 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Version 3.26.18.1 (merged r20822)

MIPS: Implement structural function and array types

R=yangguo@chromium.org
BUG=

Review URL: https://codereview.chromium.org/240653003

git-svn-id: https://v8.googlecode.com/svn/trunk@20829 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Merge remote-tracking branch 'upstream/trunk' into trunk