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

third_party/WebKit/public/web/WebSharedWorkerCreationErrors.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be found
 // in the LICENSE file.
 
 #ifndef WebSharedWorkerCreationErrors_h
 #define WebSharedWorkerCreationErrors_h
 
 #include "../platform/WebCommon.h"
 
 namespace blink {
 
 // Describes errors that can occur while creating a SharedWorker.
 enum WebWorkerCreationError {
   WebWorkerCreationErrorNone = 0,
-  WebWorkerCreationErrorURLMismatch,
   WebWorkerCreationErrorSecureContextMismatch,
   WebWorkerCreationErrorLast = WebWorkerCreationErrorSecureContextMismatch
 };
 
 }  // namespace blink
 
 #endif  // WebSharedWorkerCreationErrors_h