Very simple version of Isolates.
Very simple version of Isolates.

R=ajohnsen@google.com, iposva@google.com, kasperl@google.com, lrn@google.com

Review URL: https://codereview.chromium.org//27215002

git-svn-id: b889c0189f1adfea19efba192a3d7a5b889e4120@29271 260f80e4-7a28-3924-810f-c04153c831b5

apwilson/test,grouma/test,apwilson/test,kevmoo/test,greglittlefield-wf/test,d2m/test,Pacane/test,apwilson/test,kevmoo/test,iglherme/Guttiest,iglherme/Guttiest,d2m/test,grouma/test,grouma/test,kevmoo/test,greglittlefield-wf/test,iglherme/Guttiest,d2m/test,greglittlefield-wf/test,Pacane/test