Delete useless CompileStoreGlobal

StoreGlobal stubs are generated by Hydrogen now

BUG=
R=verwaest@chromium.org

Review URL: https://chromiumcodereview.appspot.com/23881004

Patch from Weiliang Lin <weiliang.lin2@gmail.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@16653 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
To diagnose chromium bug 284577, some additional CHECKS. TODOs are
added so these can be backed out once the cause of the bug is determined.

BUG=
R=hpayer@chromium.org

Review URL: https://codereview.chromium.org/23936007

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@16654 ce2b1a6d-e550-0410-aec6-3dcde31c8c00