Crashes under CachedResourceLoader::revalidateResource
        
Reviewed by Darin Adler.

CachedResourceLoader might get deleted from under one of its methods.
Try to catch a more informative crash stack.

* loader/cache/CachedResourceLoader.cpp:
(WebCore::CachedResourceLoader::CachedResourceLoader):
(WebCore::CachedResourceLoader::~CachedResourceLoader):
(WebCore::CachedResourceLoader::requestImage):
(WebCore::CachedResourceLoader::requestUserCSSStyleSheet):
(WebCore::CachedResourceLoader::requestResource):
(WebCore::CachedResourceLoader::setAutoLoadImages):
(WebCore::CachedResourceLoader::load):
(WebCore::CachedResourceLoader::loadDone):
(WebCore::CachedResourceLoader::preload):
(WebCore::CachedResourceLoader::requestPreload):
* loader/cache/CachedResourceLoader.h:



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@78602 268f45cc-cd09-0410-ab3c-d52691b4dbfc