Enabling a few tests when using snapshots....

test/mjsunit/debug-script.js

 // Copyright 2008 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 37 matching lines @@
       print(scripts[i].name);
       normal_count++;
       }
   } else {
     assertUnreachable('Unexpected type ' + scripts[i].type);
   }
 }
 
 // This has to be updated if the number of native scripts change.
 assertEquals(12, native_count);
+// If no snapshot is used, only the 'gc' extension is loaded.
+// If snapshot is used, all extensions are cached in the snapshot.
+assertTrue(extension_count == 1 || extension_count == 5);
 assertEquals(2, normal_count);  // This script and mjsunit.js.
 
 // Test a builtins script.
 var math_script = Debug.findScript('native math.js');
 assertEquals('native math.js', math_script.name);
 assertEquals(Debug.ScriptType.Native, math_script.type);
 
 // Test a builtins delay loaded script.
 var date_delay_script = Debug.findScript('native date.js');
 assertEquals('native date.js', date_delay_script.name);
@@ skipping 12 matching lines @@
 }
 
 // Test a normal script.
 var mjsunit_js_script = Debug.findScript(/mjsunit.js/);
 assertTrue(/mjsunit.js/.test(mjsunit_js_script.name));
 assertEquals(Debug.ScriptType.Normal, mjsunit_js_script.type);
 
 // Check a nonexistent script.
 var dummy_script = Debug.findScript('dummy.js');
 assertTrue(typeof dummy_script == 'undefined');