https://bugs.webkit.org/show_bug.cgi?id=86027
<rdar://problem/10615880>

Reviewed by Antti Koivisto.

Source/WebCore:

Added an API test.

The fix is to use CachedResourceHandle throughout MemoryCache, which will certainly
keep the resource alive. Also removed earlier fixes.

* css/CSSImageSetValue.cpp: (WebCore::CSSImageSetValue::cachedImageSet):
* css/CSSImageValue.cpp: (WebCore::CSSImageValue::cachedImage):
* css/WebKitCSSShaderValue.cpp: (WebCore::WebKitCSSShaderValue::cachedShader):
* history/PageCache.cpp: (WebCore::PageCache::releaseAutoreleasedPagesNow):
* loader/ImageLoader.cpp: (WebCore::ImageLoader::updateFromElement):
* loader/TextTrackLoader.cpp: (WebCore::TextTrackLoader::load):
* loader/cache/CachedResourceLoader.cpp:
(WebCore::CachedResourceLoader::requestImage):
(WebCore::CachedResourceLoader::requestFont):
(WebCore::CachedResourceLoader::requestTextTrack):
(WebCore::CachedResourceLoader::requestShader):
(WebCore::CachedResourceLoader::requestCSSStyleSheet):
(WebCore::CachedResourceLoader::requestUserCSSStyleSheet):
(WebCore::CachedResourceLoader::requestScript):
(WebCore::CachedResourceLoader::requestXSLStyleSheet):
(WebCore::CachedResourceLoader::requestSVGDocument):
(WebCore::CachedResourceLoader::requestLinkResource):
(WebCore::CachedResourceLoader::requestRawResource):
(WebCore::CachedResourceLoader::requestResource):
(WebCore::CachedResourceLoader::revalidateResource):
(WebCore::CachedResourceLoader::loadResource):
(WebCore::CachedResourceLoader::requestPreload):
* loader/cache/CachedResourceLoader.h: (CachedResourceLoader):
* loader/cache/MemoryCache.h: (WebCore::MemoryCache::setPruneEnabled):

* loader/cache/CachedResourceHandle.h:
(WebCore::CachedResourceHandle::CachedResourceHandle):
(WebCore::CachedResourceHandle::operator=):
Teach CachedResourceHandle how to make CachedResourceHandle<CachedResource> from
a handle to subclass.

Tools:

Added a test that's very similar to MemoryCachePruneWithinResourceLoadDelegate,
but for disabling the cache instead of triggering a prune.

* TestWebKitAPI/TestWebKitAPI.xcodeproj/project.pbxproj:
* TestWebKitAPI/Tests/mac/MemoryCacheDisableWithinResourceLoadDelegate.html: Added.
* TestWebKitAPI/Tests/mac/MemoryCacheDisableWithinResourceLoadDelegate.mm: Added.
(-[MemoryCacheDisableTestResourceLoadDelegate webView:identifierForInitialRequest:fromDataSource:]):
(-[MemoryCacheDisableTestResourceLoadDelegate webView:resource:willSendRequest:redirectResponse:fromDataSource:]):
(-[MemoryCacheDisableTestResourceLoadDelegate webView:resource:didFinishLoadingFromDataSource:]):
(-[MemoryCacheDisableTestResourceLoadDelegate webView:resource:didFailLoadingWithError:fromDataSource:]):
(TestWebKitAPI::TEST):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@116719 268f45cc-cd09-0410-ab3c-d52691b4dbfc