Revert "DevTools: CPUProfiler: provide url for scripts that have sourceURL property."

This reverts commit d95b7bb92ad1a191cf505250830d094b86d61e8f.
This reverts commit ca81c09a367600be79452e1fc53ac63b75e369c4.

record-cpu-profile.html is crashing

TBR= yurys@chromium.org, danno@chromium.org
BUG=none

Review URL: https://codereview.chromium.org/16940005

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15114 ce2b1a6d-e550-0410-aec6-3dcde31c8c00