Try to make MSVC happy about EscapableHandleScope.

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index 70e64a2285f474573009210382dc80eb51402391..19abf0fb543a1b2c12c52b6d0aebba75cd2a8fa1 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -859,6 +859,13 @@ class V8_EXPORT EscapableHandleScope : public HandleScope {
  private:
   internal::Object** Escape(internal::Object** escape_value);
 
+  // Make it hard to create heap-allocated or illegal handle scopes by
+  // disallowing certain operations.
+  EscapableHandleScope(const EscapableHandleScope&);
+  void operator=(const EscapableHandleScope&);
+  void* operator new(size_t size);
+  void operator delete(void*, size_t);
+
   internal::Object** escape_slot_;
 };