create uniform string api

R=yangguo@chromium.org
BUG=

Review URL: https://chromiumcodereview.appspot.com/12426015

Patch from Dan Carney <dcarney@chromium.org>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14379 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Fixed issue in StoreNamedField codegen where integer32 constants were not converted to a smi.

BUG=

Review URL: https://codereview.chromium.org/14075014

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14380 ce2b1a6d-e550-0410-aec6-3dcde31c8c00