Make Error.prototype.toString spec compliant; and fix various side-effect-free error printing metho…

src/runtime/runtime-internal.cc

 // Copyright 2014 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.
 
 #include "src/runtime/runtime-utils.h"
 
 #include "src/arguments.h"
 #include "src/ast/prettyprinter.h"
 #include "src/bootstrapper.h"
 #include "src/conversions.h"
@@ skipping 274 matching lines @@
 
 
 RUNTIME_FUNCTION(Runtime_MessageGetScript) {
   SealHandleScope shs(isolate);
   DCHECK(args.length() == 1);
   CONVERT_ARG_CHECKED(JSMessageObject, message, 0);
   return message->script();
 }
 
 
-RUNTIME_FUNCTION(Runtime_ErrorToStringRT) {
-  HandleScope scope(isolate);
-  DCHECK(args.length() == 1);
-  CONVERT_ARG_HANDLE_CHECKED(JSObject, error, 0);
-  Handle<String> result;
-  ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
-      isolate, result,
-      isolate->error_tostring_helper()->Stringify(isolate, error));
-  return *result;
-}
-
-
 RUNTIME_FUNCTION(Runtime_FormatMessageString) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 4);
   CONVERT_INT32_ARG_CHECKED(template_index, 0);
   CONVERT_ARG_HANDLE_CHECKED(String, arg0, 1);
   CONVERT_ARG_HANDLE_CHECKED(String, arg1, 2);
   CONVERT_ARG_HANDLE_CHECKED(String, arg2, 3);
   Handle<String> result;
   ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
       isolate, result,
@@ skipping 133 matching lines @@
   HandleScope scope(isolate);
   DCHECK_EQ(1, args.length());
   CONVERT_ARG_HANDLE_CHECKED(Object, object, 0);
   Handle<String> callsite = RenderCallSite(isolate, object);
   THROW_NEW_ERROR_RETURN_FAILURE(
       isolate, NewTypeError(MessageTemplate::kNotConstructor, callsite));
 }
 
 }  // namespace internal
 }  // namespace v8