[WIP] off-main-thread loading

third_party/WebKit/Source/core/probe/CoreProbes.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 102 matching lines @@
 void allAsyncTasksCanceled(ExecutionContext* context) {
   if (ThreadDebugger* debugger = ThreadDebugger::from(toIsolate(context)))
     debugger->allAsyncTasksCanceled();
 }
 
 void didReceiveResourceResponseButCanceled(LocalFrame* frame,
                                            DocumentLoader* loader,
                                            unsigned long identifier,
                                            const ResourceResponse& r,
                                            Resource* resource) {
-  didReceiveResourceResponse(frame, identifier, loader, r, resource);
+  didReceiveResourceResponse(frame->document(), identifier, loader, r,
+                             resource);
 }
 
 void canceledAfterReceivedResourceResponse(LocalFrame* frame,
                                            DocumentLoader* loader,
                                            unsigned long identifier,
                                            const ResourceResponse& r,
                                            Resource* resource) {
   didReceiveResourceResponseButCanceled(frame, loader, identifier, r, resource);
 }
 
 void continueWithPolicyIgnore(LocalFrame* frame,
                               DocumentLoader* loader,
                               unsigned long identifier,
                               const ResourceResponse& r,
                               Resource* resource) {
   didReceiveResourceResponseButCanceled(frame, loader, identifier, r, resource);
 }
 
 CoreProbeSink* toCoreProbeSink(WorkerGlobalScope* workerGlobalScope) {
   if (!workerGlobalScope)
     return nullptr;
+  WorkerThread* thread = workerGlobalScope->thread();
+  // |thread| is null after WorkerGlobalScope::dispose() is called.
+  if (!thread)
+    return nullptr;
   if (WorkerInspectorController* controller =
-          workerGlobalScope->thread()->workerInspectorController())
+          workerGlobalScope->thread()->workerInspectorController()) {
     return controller->instrumentingAgents();
+  }
   return nullptr;
 }
 
 CoreProbeSink* toCoreProbeSinkForNonDocumentContext(ExecutionContext* context) {
   if (context->isWorkerGlobalScope())
     return toCoreProbeSink(toWorkerGlobalScope(context));
   if (context->isMainThreadWorkletGlobalScope())
     return toCoreProbeSink(toMainThreadWorkletGlobalScope(context)->frame());
   return nullptr;
 }
 
 }  // namespace probe
 }  // namespace blink