Add an error page for resources blocked via XSS Auditor.

third_party/WebKit/Source/web/WebLocalFrameImpl.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 2015 matching lines @@
   // unreachableURL informs FrameLoader::reload to load unreachableURL
   // instead of the currently loaded URL.
   ResourceRequest request;
   if (replace && !unreachableURL.isEmpty() &&
       frame()->loader().provisionalDocumentLoader())
     request = frame()->loader().provisionalDocumentLoader()->originalRequest();
   request.setURL(baseURL);
   request.setCheckForBrowserSideNavigation(false);
 
   FrameLoadRequest frameRequest(
-      0, request, SubstituteData(data, mimeType, textEncoding, unreachableURL));
+      0, request, SubstituteData(data, mimeType, textEncoding, unreachableURL,
+                                 ForceSynchronousLoad));
   DCHECK(frameRequest.substituteData().isValid());
   frameRequest.setReplacesCurrentItem(replace);
   if (isClientRedirect)
     frameRequest.setClientRedirect(ClientRedirectPolicy::ClientRedirect);
 
   HistoryItem* historyItem = item;
   frame()->loader().load(
       frameRequest, static_cast<FrameLoadType>(webFrameLoadType), historyItem,
       static_cast<HistoryLoadType>(webHistoryLoadType));
 }
@@ skipping 327 matching lines @@
     feature = UseCounter::ChromeLoadTimesNpnNegotiatedProtocol;
   } else if (metric == "wasAlternateProtocolAvailable") {
     feature = UseCounter::ChromeLoadTimesWasAlternateProtocolAvailable;
   } else if (metric == "connectionInfo") {
     feature = UseCounter::ChromeLoadTimesConnectionInfo;
   }
   UseCounter::count(frame(), feature);
 }
 
 }  // namespace blink