Add last OS error into heap stats.

src/platform-nullos.cc

 // Copyright 2006-2008 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 82 matching lines @@
 }
 
 
 // Returns the daylight savings offset in milliseconds for the given time.
 double OS::DaylightSavingsOffset(double time) {
   UNIMPLEMENTED();
   return 0;
 }
 
 
+int OS::GetLastError() {
+  UNIMPLEMENTED();
+  return 0;
+}
+
+
 // Returns the local time offset in milliseconds east of UTC without
 // taking daylight savings time into account.
 double OS::LocalTimeOffset() {
   UNIMPLEMENTED();
   return 0;
 }
 
 
 // Print (debug) message to console.
 void OS::Print(const char* format, ...) {
@@ skipping 332 matching lines @@
 }
 
 
 void ProfileSampler::Stop() {
   UNIMPLEMENTED();
 }
 
 #endif  // ENABLE_LOGGING_AND_PROFILING
 
 } }  // namespace v8::internal