CORS errors print error twice on preload.

Source/core/fetch/ResourceFetcher.cpp

Index: Source/core/fetch/ResourceFetcher.cpp
diff --git a/Source/core/fetch/ResourceFetcher.cpp b/Source/core/fetch/ResourceFetcher.cpp
index 689d8f481624f4b1bb1f63787e7336bf613a2381..26c9e5b6852c21f03b562d078ff8137e45cf51d4 100644
--- a/Source/core/fetch/ResourceFetcher.cpp
+++ b/Source/core/fetch/ResourceFetcher.cpp
@@ -585,7 +585,8 @@ bool ResourceFetcher::canRequest(Resource::Type type, const ResourceRequest& res
 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())
@@ -598,7 +599,7 @@ bool ResourceFetcher::canAccessResource(Resource* resource, SecurityOrigin* sour
     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));
         }