Disallow cross-thread Persistent<> read access.

third_party/WebKit/Source/web/WebSharedWorkerImpl.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 335 matching lines @@
     WebContentSecurityPolicyType policyType,
     WebAddressSpace creationAddressSpace) {
   m_url = url;
   m_name = name;
   m_creationAddressSpace = creationAddressSpace;
   initializeLoader();
 }
 
 void WebSharedWorkerImpl::didReceiveScriptLoaderResponse() {
   InspectorInstrumentation::didReceiveScriptResponse(
-      m_loadingDocument.get(), m_mainScriptLoader->identifier());
+      m_loadingDocument, m_mainScriptLoader->identifier());
   m_client->selectAppCacheID(m_mainScriptLoader->appCacheID());
 }
 
 void WebSharedWorkerImpl::onScriptLoaderFinished() {
   DCHECK(m_loadingDocument);
   DCHECK(m_mainScriptLoader);
   if (m_askedToTerminate)
     return;
   if (m_mainScriptLoader->failed()) {
     m_mainScriptLoader->cancel();
@@ skipping 41 matching lines @@
   // a document's frame but these documents can be from a different process. So
   // we intentionally populate the task runners with null document in order to
   // use the thread's default task runner. Note that |m_document| should not be
   // used as it's a dummy document for loading that doesn't represent the frame
   // of any associated document.
   m_parentFrameTaskRunners = ParentFrameTaskRunners::create(nullptr);
 
   m_loaderProxy = WorkerLoaderProxy::create(this);
   m_workerThread = SharedWorkerThread::create(m_name, m_loaderProxy, *this,
                                               m_parentFrameTaskRunners.get());
-  InspectorInstrumentation::scriptImported(m_loadingDocument.get(),
+  InspectorInstrumentation::scriptImported(m_loadingDocument,
                                            m_mainScriptLoader->identifier(),
                                            m_mainScriptLoader->script());
   m_mainScriptLoader.clear();
 
   workerThread()->start(std::move(startupData));
-  m_workerInspectorProxy->workerThreadCreated(
-      toDocument(m_loadingDocument.get()), workerThread(), m_url);
+  m_workerInspectorProxy->workerThreadCreated(toDocument(m_loadingDocument),
+                                              workerThread(), m_url);
   m_client->workerScriptLoaded();
 }
 
 void WebSharedWorkerImpl::terminateWorkerContext() {
   terminateWorkerThread();
 }
 
 void WebSharedWorkerImpl::pauseWorkerContextOnStart() {
   m_pauseWorkerContextOnStart = true;
 }
@@ skipping 30 matching lines @@
   if (devtoolsAgent)
     devtoolsAgent->dispatchOnInspectorBackend(sessionId, callId, method,
                                               message);
 }
 
 WebSharedWorker* WebSharedWorker::create(WebSharedWorkerClient* client) {
   return new WebSharedWorkerImpl(client);
 }
 
 }  // namespace blink