Avoid name clashes of builtins and runtime functions.

src/messages.js

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // -------------------------------------------------------------------
 
 var kMessages = {
   // Error
   cyclic_proto:                  ["Cyclic __proto__ value"],
   code_gen_from_strings:         ["%0"],
@@ skipping 939 matching lines @@
   var line = "";
   var functionName = this.getFunctionName();
   var addSuffix = true;
   var isConstructor = this.isConstructor();
   var isMethodCall = !(this.isToplevel() || isConstructor);
   if (isMethodCall) {
     var typeName = GetTypeName(GET_PRIVATE(this, CallSiteReceiverKey), true);
     var methodName = this.getMethodName();
     if (functionName) {
       if (typeName &&
-          %_CallFunction(functionName, typeName, StringIndexOf) != 0) {
+          %_CallFunction(functionName, typeName, StringIndexOfJS) != 0) {
         line += typeName + ".";
       }
       line += functionName;
       if (methodName &&
-          (%_CallFunction(functionName, "." + methodName, StringIndexOf) !=
+          (%_CallFunction(functionName, "." + methodName, StringIndexOfJS) !=
            functionName.length - methodName.length - 1)) {
         line += " [as " + methodName + "]";
       }
     } else {
       line += typeName + "." + (methodName || "<anonymous>");
     }
   } else if (isConstructor) {
     line += "new " + (functionName || "<anonymous>");
   } else if (functionName) {
     line += functionName;
@@ skipping 357 matching lines @@
     return result;
   };
 
   %DefineOrRedefineAccessorProperty(
       boilerplate, 'stack', getter, setter, DONT_ENUM);
 
   return boilerplate;
 }
 
 var kStackOverflowBoilerplate = SetUpStackOverflowBoilerplate();