Fixed output of evaluated expressions from the debugger in the developer shell.

Use global evaluate request from developer shell if there is no JavaScript stack.

Remove use of JS2C macros in developer shell JavaScript code.
Review URL: http://codereview.chromium.org/21350

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1273 ce2b1a6d-e550-0410-aec6-3dcde31c8c00