CSP: Dedicated workers always inherit policy.

third_party/WebKit/Source/core/workers/InProcessWorkerMessagingProxy.cpp

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  * 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 65 matching lines @@
 }
 
 InProcessWorkerMessagingProxy::~InProcessWorkerMessagingProxy() {
   DCHECK(!m_workerObject);
 }
 
 void InProcessWorkerMessagingProxy::startWorkerGlobalScope(
     const KURL& scriptURL,
     const String& userAgent,
     const String& sourceCode,
-    ContentSecurityPolicy* contentSecurityPolicy,
     const String& referrerPolicy) {
   DCHECK(isParentContextThread());
   if (askedToTerminate()) {
     // Worker.terminate() could be called from JS before the thread was
     // created.
     return;
   }
 
   Document* document = toDocument(getExecutionContext());
   SecurityOrigin* starterOrigin = document->getSecurityOrigin();
 
-  ContentSecurityPolicy* csp = contentSecurityPolicy
-                                   ? contentSecurityPolicy
-                                   : document->contentSecurityPolicy();
+  ContentSecurityPolicy* csp = document->contentSecurityPolicy();
   DCHECK(csp);
 
   WorkerThreadStartMode startMode =
       workerInspectorProxy()->workerStartMode(document);
   std::unique_ptr<WorkerSettings> workerSettings =
       WTF::wrapUnique(new WorkerSettings(document->settings()));
   WorkerV8Settings workerV8Settings(WorkerV8Settings::Default());
   workerV8Settings.m_heapLimitMode =
       toIsolate(document)->IsHeapLimitIncreasedForDebugging()
           ? WorkerV8Settings::HeapLimitMode::IncreasedForDebugging
@@ skipping 126 matching lines @@
 }
 
 bool InProcessWorkerMessagingProxy::hasPendingActivity() const {
   DCHECK(isParentContextThread());
   if (askedToTerminate())
     return false;
   return m_workerGlobalScopeHasPendingActivity;
 }
 
 }  // namespace blink