Add support for //# sourceURL similar to deprecated //@ sourceURL one.

BUG=v8:2702
R=yangguo@chromium.org, yurys@chromium.org

Review URL: https://codereview.chromium.org/15859010

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14883 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Improve range analysis for modulo operations.

R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/15952004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14884 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Fix AccessArgumentsAt on ARM. Use register for index.

R=jkummerow@chromium.org

Review URL: https://chromiumcodereview.appspot.com/15690009

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14885 ce2b1a6d-e550-0410-aec6-3dcde31c8c00