Add Page.stopLoading to devtools and --timeout switch to headless_shell

third_party/WebKit/Source/core/inspector/InspectorPageAgent.cpp

 /*
  * Copyright (C) 2011 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 445 matching lines @@
   m_inspectedFrames->root()->reload(reloadType,
                                     ClientRedirectPolicy::NotClientRedirect);
   return Response::OK();
 }
 
 Response InspectorPageAgent::navigate(const String& url, String* outFrameId) {
   *outFrameId = frameId(m_inspectedFrames->root());
   return Response::OK();
 }
 
+Response InspectorPageAgent::stopLoading() {
+  return Response::OK();
+}
+
 static void cachedResourcesForDocument(Document* document,
                                        HeapVector<Member<Resource>>& result,
                                        bool skipXHRs) {
   const ResourceFetcher::DocumentResourceMap& allResources =
       document->fetcher()->allResources();
   for (const auto& resource : allResources) {
     Resource* cachedResource = resource.value.get();
     if (!cachedResource)
       continue;
 
@@ skipping 405 matching lines @@
   return Response::OK();
 }
 
 DEFINE_TRACE(InspectorPageAgent) {
   visitor->trace(m_inspectedFrames);
   visitor->trace(m_inspectorResourceContentLoader);
   InspectorBaseAgent::trace(visitor);
 }
 
 }  // namespace blink