Reviewed by Darin.
        
        Fix http://bugs.webkit.org/show_bug.cgi?id=17862
        REGRESSION (r31038): Reproducible crash under DocLoader::checkForReload() at marware.com
        
        This was a memory smasher introduced by the preloading patch. 
        If a script resource was marked uncacheable, early deletion of the 
        Request object would cause deletion of the CachedResource too if
        it was referred more than once in a single document.

        Test: http/tests/misc/uncacheable-script-repeated.html

        * loader/loader.cpp:
        (WebCore::Loader::Host::servePendingRequests):
        (WebCore::Loader::Host::didFinishLoading):

LayoutTests:

        Reviewed by Darin.
        
        Test for http://bugs.webkit.org/show_bug.cgi?id=17862
        REGRESSION (r31038): Reproducible crash under DocLoader::checkForReload() at marware.com

        * http/tests/misc/resources/uncacheable-script.cgi: Added.
        * http/tests/misc/uncacheable-script-repeated-expected.txt: Added.
        * http/tests/misc/uncacheable-script-repeated.html: Added.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@31084 268f45cc-cd09-0410-ab3c-d52691b4dbfc