added type checks on fast return values

R=svenpanne@chromium.org
BUG=

Review URL: https://codereview.chromium.org/16939003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15188 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Fixed read-only attribute of Function.length in strict mode.

R=cira@chromium.org

Review URL: https://codereview.chromium.org/17006006

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15189 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Prepare push to trunk. Now working on 3.19.19.

R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/17392002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15190 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Turn on parallel recompilation.

R=jkummerow@chromium.org
BUG=

Review URL: https://chromiumcodereview.appspot.com/17394002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15193 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Remove obsolete elements kind check for array literals.

R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/17378005

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15194 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Do not modify FLAG_parallel_recompilation after start up.

R=jkummerow@chromium.org
BUG=

Review URL: https://chromiumcodereview.appspot.com/17202006

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15195 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Tweak type info threshold.

R=jkummerow@chromium.org
BUG=

Review URL: https://chromiumcodereview.appspot.com/17390004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15196 ce2b1a6d-e550-0410-aec6-3dcde31c8c00