Revert "Removed support deprecated (//@|/*@) source(URL|MappingURL)="

test/mjsunit/regress/regress-conditional-position.js

 // Copyright 2010 the V8 project authors. 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
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 68 matching lines @@
   functionToCatch = f;
   f();
 
   assertEquals(expectedLineNumber, lineNumber);
 }
 
 test(test1, 58);
 test(test2, 65);
 test(test3, 72);
 
-eval(test1.toString() + "//# sourceUrl=foo");
-eval(test2.toString() + "//# sourceUrl=foo");
-eval(test3.toString() + "//# sourceUrl=foo");
+eval(test1.toString() + "//@ sourceUrl=foo");
+eval(test2.toString() + "//@ sourceUrl=foo");
+eval(test3.toString() + "//@ sourceUrl=foo");
 
 test(test1, 2);
 test(test2, 3);
 test(test3, 3);