Drop [LegacyInterfaceTypeChecking] for URL.createObjectURL(blob)

third_party/WebKit/Source/core/dom/DOMURL.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  * Copyright (C) 2012 Motorola Mobility Inc.
  *
  * 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.
@@ skipping 46 matching lines @@
         m_url = url;
         m_input = String();
     } else {
         m_url = KURL();
         m_input = value;
     }
 }
 
 String DOMURL::createObjectURL(ExecutionContext* executionContext, Blob* blob, ExceptionState& exceptionState)
 {
-    if (!executionContext || !blob)
+    ASSERT(blob);
+    if (!executionContext)
         return String();
     if (blob->hasBeenClosed()) {
         exceptionState.throwDOMException(InvalidStateError, String(blob->isFile() ? "File" : "Blob") + " has been closed.");
         return String();
     }
     return createPublicURL(executionContext, blob, blob->uuid());
 }
 
 String DOMURL::createPublicURL(ExecutionContext* executionContext, URLRegistrable* registrable, const String& uuid)
 {
@@ skipping 18 matching lines @@
 
 void DOMURL::revokeObjectUUID(ExecutionContext* executionContext, const String& uuid)
 {
     if (!executionContext)
         return;
 
     executionContext->publicURLManager().revoke(uuid);
 }
 
 } // namespace blink