Only copy with, block and catch scopes in DebugEvaluate.

R=ulan@chromium.org
BUG=171715

Review URL: https://chromiumcodereview.appspot.com/13093003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14077 ce2b1a6d-e550-0410-aec6-3dcde31c8c00