Fixes <http://webkit.org/b/30421>.

Fixes <http://webkit.org/b/30421>.
Web Inpsector: Local Files can show up on Cookies List with Cookies from other Domain.

Reviewed by Alice Liu.

When a page like Google generates an about:blank, it shows up as a local file on
the list of Cookie domains, but has all of the cookies of Google. When we are adding
cookie domains to the inspector, we should only add the domain is the URL of the resource
is in the HTTP protocol family or a file URL.

* inspector/InspectorController.cpp:
(WebCore::InspectorController::populateScriptObjects):
(WebCore::InspectorController::didFinishLoading):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@49883 268f45cc-cd09-0410-ab3c-d52691b4dbfc