Unreviewed, rolling out r228103.

This caused multiple tests to crash.

Reverted changeset:

"Use downcast in createLinkPreloadResourceClient"
https://bugs.webkit.org/show_bug.cgi?id=182488
https://trac.webkit.org/changeset/228103

Canonical link: https://commits.webkit.org/198298@main
git-svn-id: https://svn.webkit.org/repository/webkit/trunk@228117 268f45cc-cd09-0410-ab3c-d52691b4dbfc

Source/WebCore/ChangeLog

@@ -1,3 +1,15 @@
+2018-02-05  Matt Lewis  <jlewis3@apple.com>
+
+        Unreviewed, rolling out r228103.
+
+        This caused multiple tests to crash.
+
+        Reverted changeset:
+
+        "Use downcast in createLinkPreloadResourceClient"
+        https://bugs.webkit.org/show_bug.cgi?id=182488
+        https://trac.webkit.org/changeset/228103
+
 2018-02-05  Eric Carlson  <eric.carlson@apple.com>
 
         [iOS] VideoFullscreenInterfaceAVKit should not ignore errors

Source/WebCore/loader/LinkLoader.cpp

@@ -139,13 +139,13 @@ static std::unique_ptr<LinkPreloadResourceClient> createLinkPreloadResourceClien
 {
     switch (resource.type()) {
     case CachedResource::ImageResource:
-        return LinkPreloadImageResourceClient::create(loader, downcast<CachedImage>(resource));
+        return LinkPreloadImageResourceClient::create(loader, static_cast<CachedImage&>(resource));
     case CachedResource::Script:
-        return LinkPreloadScriptResourceClient::create(loader, downcast<CachedScript>(resource));
+        return LinkPreloadScriptResourceClient::create(loader, static_cast<CachedScript&>(resource));
     case CachedResource::CSSStyleSheet:
-        return LinkPreloadStyleResourceClient::create(loader, downcast<CachedCSSStyleSheet>(resource));
+        return LinkPreloadStyleResourceClient::create(loader, static_cast<CachedCSSStyleSheet&>(resource));
     case CachedResource::FontResource:
-        return LinkPreloadFontResourceClient::create(loader, downcast<CachedFont>(resource));
+        return LinkPreloadFontResourceClient::create(loader, static_cast<CachedFont&>(resource));
     case CachedResource::MediaResource:
         if (!RuntimeEnabledFeatures::sharedFeatures().mediaPreloadingEnabled())
             ASSERT_NOT_REACHED();
@@ -154,7 +154,7 @@ static std::unique_ptr<LinkPreloadResourceClient> createLinkPreloadResourceClien
     case CachedResource::TextTrackResource:
 #endif
     case CachedResource::RawResource:
-        return LinkPreloadRawResourceClient::create(loader, downcast<CachedRawResource>(resource));
+        return LinkPreloadRawResourceClient::create(loader, static_cast<CachedRawResource&>(resource));
     case CachedResource::MainResource:
     case CachedResource::Icon:
 #if ENABLE(SVG_FONTS)