Disable copy constructor in public: section or use macro.

src/handles.h

Index: src/handles.h
diff --git a/src/handles.h b/src/handles.h
index a7cd0e2497f74372b2eed759b8b386721493ed5e..a7eb31efca959bca1374f4c98c6e81d5262eb155 100644
--- a/src/handles.h
+++ b/src/handles.h
@@ -293,8 +293,6 @@ class HandleScope {
 
  private:
   // Prevent heap allocation or illegal handle scopes.
-  HandleScope(const HandleScope&);
-  void operator=(const HandleScope&);
   void* operator new(size_t size);
   void operator delete(void* size_t);
 
@@ -320,6 +318,8 @@ class HandleScope {
   friend class DeferredHandleScope;
   friend class HandleScopeImplementer;
   friend class Isolate;
+
+  DISALLOW_COPY_AND_ASSIGN(HandleScope);
 };