Add properties fileName and lineNumber to the Error object.

src/messages.js

 // Copyright 2011 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 1053 matching lines @@
     var pos = %FunctionGetPositionForOffset(code, pc);
     frames.push(new CallSite(recv, fun, pos));
   }
   if (IS_FUNCTION($Error.prepareStackTrace)) {
     return $Error.prepareStackTrace(error, frames);
   } else {
     return FormatStackTrace(error, frames);
   }
 }
 
+function GetTopFrame(raw_stack) {
+  for (var i = 0; i < raw_stack.length; i += 4) {
+    var recv = raw_stack[i];
+    var fun = raw_stack[i + 1];
+    var code = raw_stack[i + 2];
+    var pc = raw_stack[i + 3];
+    var pos = %FunctionGetPositionForOffset(code, pc);
+    var top_frame = new CallSite(recv, fun, pos);
+    if (!top_frame.isNative()) return top_frame;
+  }
+  return undefined;
+}
 
 function captureStackTrace(obj, cons_opt) {
   var stackTraceLimit = $Error.stackTraceLimit;
   if (!stackTraceLimit || !IS_NUMBER(stackTraceLimit)) return;
   if (stackTraceLimit < 0 || stackTraceLimit > 10000) {
     stackTraceLimit = 10000;
   }
   var raw_stack = %CollectStackTrace(cons_opt
                                      ? cons_opt
                                      : captureStackTrace, stackTraceLimit);
   DefineOneShotAccessor(obj, 'stack', function (obj) {
     return FormatRawStackTrace(obj, raw_stack);
   });
+
+  DefineOneShotAccessor(obj, 'lineNumber', function (obj) {
+    var frame = GetTopFrame(raw_stack);
+    return frame ? frame.getLineNumber() : undefined;
+  });
+  DefineOneShotAccessor(obj, 'fileName', function (obj) {
+    var frame = GetTopFrame(raw_stack);
+    return frame ? (frame.isEval() ? frame.getEvalOrigin()
+                                   : frame.getFileName())
+                 : undefined;
+  });
 }
 
 
 function SetUpError() {
   // Define special error type constructors.
 
   function DefineError(f) {
     // Store the error function in both the global object
     // and the runtime object. The function is fetched
     // from the runtime object when throwing errors from
@@ skipping 110 matching lines @@
     throw e;
   }
 }
 
 
 InstallFunctions($Error.prototype, DONT_ENUM, ['toString', ErrorToString]);
 
 // Boilerplate for exceptions for stack overflows. Used from
 // Isolate::StackOverflow().
 const kStackOverflowBoilerplate = MakeRangeError('stack_overflow', []);