Parallelize cpplint in presubmit and fix usage of DISALLOW_* macros.

src/platform-macos.cc

Index: src/platform-macos.cc
diff --git a/src/platform-macos.cc b/src/platform-macos.cc
index 369c3e4034a1438d33edc0e37e43834349ed0115..9f8fe1209fffa97edd6c59698b1418860ea3ca49 100644
--- a/src/platform-macos.cc
+++ b/src/platform-macos.cc
@@ -1,4 +1,4 @@
-// Copyright 2011 the V8 project authors. All rights reserved.
+// Copyright 2012 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:
@@ -854,6 +854,7 @@ class SamplerThread : public Thread {
   static Mutex* mutex_;
   static SamplerThread* instance_;
 
+ private:
   DISALLOW_COPY_AND_ASSIGN(SamplerThread);
 };