Version 3.21.13

Added a ResourceConstraint for the embedder to specify that V8 is running on a memory constrained device. (Chromium issue 280984)

Removed HandleScope default ctor. (Chromium issue 236173)

Enabled escape analysis for Hydrogen.

Correctly stringified mixed encoding indirect strings. (Chromium issue 287476)

Performance and stability improvements on all platforms.

git-svn-id: https://v8.googlecode.com/svn/trunk@16634 ce2b1a6d-e550-0410-aec6-3dcde31c8c00