Update comments in core lib showing proper factory syntax.

runtime/vm/code_generator_ia32.cc

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_IA32.
 #if defined(TARGET_ARCH_IA32)
 
 #include "vm/code_generator.h"
 
 #include "lib/error.h"
@@ skipping 2726 matching lines @@
                                          intptr_t token_index) {
   pc_descriptors_list_->AddDescriptor(kind,
                                       assembler_->CodeSize(),
                                       node_id,
                                       token_index,
                                       state()->try_index());
 }
 
 
 void CodeGenerator::ErrorMsg(intptr_t token_index, const char* format, ...) {
-  char error_msg[Parser::kErrorBuflen];
+  const intptr_t kMessageBufferSize = 512;
+  char message_buffer[kMessageBufferSize];
   va_list args;
   va_start(args, format);
   const Class& cls = Class::Handle(parsed_function_.function().owner());
   const Script& script = Script::Handle(cls.script());
-  Parser::ReportMsg(script, token_index, "Error", error_msg, format, args);
-  Isolate::Current()->long_jump_base()->Jump(1, error_msg);
+  Parser::FormatMessage(script, token_index, "Error",
+                        message_buffer, kMessageBufferSize,
+                        format, args);
+  va_end(args);
+  Isolate::Current()->long_jump_base()->Jump(1, message_buffer);
   UNREACHABLE();
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_IA32