Version 3.26.31.10 (merged r22003)

Grow heap slower if GC freed many global handles.

BUG=263503,305878
LOG=N
R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/368863002

git-svn-id: https://v8.googlecode.com/svn/branches/3.26@22160 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Merge remote-tracking branch 'upstream/3.26' into 3.26