CORS errors print error twice on preload.

Source/core/fetch/ResourceFetcher.cpp

 /*
     Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
     Copyright (C) 2001 Dirk Mueller (mueller@kde.org)
     Copyright (C) 2002 Waldo Bastian (bastian@kde.org)
     Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
     Copyright (C) 2009 Torch Mobile Inc. http://www.torchmobile.com/
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Library General Public
     License as published by the Free Software Foundation; either
@@ skipping 567 matching lines @@
     }
 
     MixedContentChecker::ReportingStatus mixedContentReporting = forPreload ?
         MixedContentChecker::SuppressReport : MixedContentChecker::SendReport;
     return !MixedContentChecker::shouldBlockFetch(effectiveFrame, resourceRequest, url, mixedContentReporting);
 }
 
 bool ResourceFetcher::canAccessResource(Resource* resource, SecurityOrigin* sourceOrigin, const KURL& url) const
 {
     // Redirects can change the response URL different from one of request.
-    if (!canRequest(resource->type(), resource->resourceRequest(), url, resource->options(), resource->isUnusedPreload(), FetchRequest::UseDefaultOriginRestrictionForType))
+    bool forPreload = resource->isUnusedPreload();
+    if (!canRequest(resource->type(), resource->resourceRequest(), url, resource->options(), forPreload, FetchRequest::UseDefaultOriginRestrictionForType))
         return false;
 
     if (!sourceOrigin && document())
         sourceOrigin = document()->securityOrigin();
 
     if (sourceOrigin->canRequest(url))
         return true;
 
     String errorDescription;
     if (!resource->passesAccessControlCheck(document(), sourceOrigin, errorDescription)) {
         if (resource->type() == Resource::Font)
             toFontResource(resource)->setCORSFailed();
-        if (frame() && frame()->document()) {
+        if (!forPreload && frame() && frame()->document()) {
             String resourceType = Resource::resourceTypeToString(resource->type(), resource->options().initiatorInfo);
             frame()->document()->addConsoleMessage(ConsoleMessage::create(JSMessageSource, ErrorMessageLevel, resourceType + " from origin '" + SecurityOrigin::create(url)->toString() + "' has been blocked from loading by Cross-Origin Resource Sharing policy: " + errorDescription));
         }
         return false;
     }
     return true;
 }
 
 bool ResourceFetcher::isControlledByServiceWorker() const
 {
@@ skipping 1026 matching lines @@
     ResourceLoaderHost::trace(visitor);
 }
 
 ResourceFetcher* ResourceFetcher::toResourceFetcher(ResourceLoaderHost* host)
 {
     ASSERT(host->objectType() == ResourceLoaderHost::ResourceFetcherType);
     return static_cast<ResourceFetcher*>(host);
 }
 
 }