Revert "Separate preaload matching from MemoryCache"

third_party/WebKit/Source/core/loader/DocumentLoader.cpp

Index: third_party/WebKit/Source/core/loader/DocumentLoader.cpp
diff --git a/third_party/WebKit/Source/core/loader/DocumentLoader.cpp b/third_party/WebKit/Source/core/loader/DocumentLoader.cpp
index d54daaaf746fbd5a2a6a3fed6f48fa6960c3e6ca..db77967ab6c8f5ebb6d4107d8bf7a8d0ce5d5860 100644
--- a/third_party/WebKit/Source/core/loader/DocumentLoader.cpp
+++ b/third_party/WebKit/Source/core/loader/DocumentLoader.cpp
@@ -217,6 +217,11 @@ Resource* DocumentLoader::StartPreload(Resource::Type type,
       NOTREACHED();
   }
 
+  // CSP layout tests verify that preloads are subject to access checks by
+  // seeing if they are in the `preload started` list. Therefore do not add
+  // them to the list if the load is immediately denied.
+  if (resource && !resource->GetResourceError().IsAccessCheck())
+    Fetcher()->PreloadStarted(resource);
   return resource;
 }