Revert "CPUProfiler: propagate scriptId to the front-end"

This reverts commit d575f6bc8b262dac08f02913ae6e7c504c9dd900.

Check is failing on debug bots.

TBR= yurys@chromium.org

Review URL: https://chromiumcodereview.appspot.com/18332010

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15431 ce2b1a6d-e550-0410-aec6-3dcde31c8c00