Remove DOM prefix from several IDL interfaces

Source/core/html/URL.idl

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  * Copyright (C) 2012 Motorola Mobility Inc.
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 [
     Constructor,
-    InterfaceName=URL,
+    ImplementedAs=DOMURL,
     ImplementationLacksVTable
-] interface DOMURL {
+] interface URL {
     [EnabledAtRuntime=webKitMediaSource,CallWith=ScriptExecutionContext,TreatReturnedNullStringAs=Null] static DOMString createObjectURL(WebKitMediaSource? source);
     [CallWith=ScriptExecutionContext,TreatReturnedNullStringAs=Null] static DOMString createObjectURL(MediaStream? stream);
     [CallWith=ScriptExecutionContext,TreatReturnedNullStringAs=Null] static DOMString createObjectURL(Blob? blob);
     [CallWith=ScriptExecutionContext] static void revokeObjectURL(DOMString url);
 };