Chrome Version       : 6.0.466.0
URLs (if applicable) : http://tc.labs.opera.com/apis/EventSource/003.htm
Other browsers tested:
     Safari 4: OK

What steps will reproduce the problem?
1. Run the testcase.

What is the expected result?

PASS, as can be seen in Safari (which uses KURL rather than GURL).

What happens instead?

The test failed. Chrome should be throwing a SYNTAX_ERR (spaces in hostnames aren't allowed) as the URL is invalid, however, doesn't.

WebKit handling of the EventSource can be found in:
  WebCore/platform/EventSource.cpp (line 73-88)

Steps in WebKit are:
  1. Check if the URL is empty (if so: throw SYNTAX_ERR)
  2. Check if the URL is valid (if not: throw SYNTAX_ERR)
  3. Check if the URL can be requested from the security origin (if not: throw SECURITY_ERR).
  4. Create and connect to the EventSource.

GURL seems to bug at step 2. The test-case throws a SECURITY_ERR which indicates that the isValid() call on line 79 does not return false. Reporting the issue here as URL parsing gets done by GURL in Chrome.