Revert of [tickprocessor] Consider top of the stack as pc if it points to a code object.

tools/tickprocessor.js

 // Copyright 2012 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 347 matching lines @@
     // Don't use PC when in external callback code, as it can point
     // inside callback's code, and we will erroneously report
     // that a callback calls itself. Instead we use tos_or_external_callback,
     // as simply resetting PC will produce unaccounted ticks.
     pc = tos_or_external_callback;
     tos_or_external_callback = 0;
   } else if (tos_or_external_callback) {
     // Find out, if top of stack was pointing inside a JS function
     // meaning that we have encountered a frameless invocation.
     var funcEntry = this.profile_.findEntry(tos_or_external_callback);
-    if (!funcEntry) {
+    if (!funcEntry || !funcEntry.isJSFunction || !funcEntry.isJSFunction()) {
       tos_or_external_callback = 0;
     }
   }
 
   this.profile_.recordTick(
       ns_since_start, vmState,
       this.processStack(pc, tos_or_external_callback, stack));
 };
 
 
@@ skipping 589 matching lines @@
     for (var synArg in this.argsDispatch_) {
       if (arg !== synArg && dispatch === this.argsDispatch_[synArg]) {
         synonyms.push(synArg);
         delete this.argsDispatch_[synArg];
       }
     }
     print('  ' + padRight(synonyms.join(', '), 20) + " " + dispatch[2]);
   }
   quit(2);
 };