Add broader custom test expectations for blink tests to detect crashes. Remove also useless documentation.

Most of these tests had some problems (failure, crash or timeout), but which problem exactly cannot be retrieved anymore.

We let them rum for a while with a broader test expectation (pass fail slow) and analyse the results.

Tests that crash get a crash expectation. Timeouts will get a timeout expectation.

R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/18319005

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15409 ce2b1a6d-e550-0410-aec6-3dcde31c8c00