SharedWorker: Make shared workers keyed by a pair of url and name

third_party/WebKit/public/web/WebSharedWorkerRepositoryClient.h

 /*
  * Copyright (C) 2013 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 31 matching lines @@
 enum WebContentSecurityPolicyType;
 class WebString;
 class WebURL;
 
 class WebSharedWorkerRepositoryClient {
  public:
   // Unique identifier for the parent document of a worker (unique within a
   // given process).
   using DocumentID = unsigned long long;
 
-  // Creates a new shared worker connector. This may return null.
+  // Creates a new shared worker connector.
   virtual std::unique_ptr<WebSharedWorkerConnector> createSharedWorkerConnector(
       const WebURL& url,
       const WebString& name,
       DocumentID id,
       const WebString& contentSecurityPolicy,
       WebContentSecurityPolicyType,
       WebAddressSpace,
       WebSharedWorkerCreationContextType,
       WebWorkerCreationError* error) {
     return nullptr;
   }
 
   // Invoked when a document has been detached. DocumentID can be re-used after
   // documentDetached() is invoked.
   virtual void documentDetached(DocumentID) {}
 };
 
 }  // namespace blink
 
 #endif  // WebSharedWorkerRepositoryClient_h