webkit build fix for 15142

TBR=svenpanne@chromium.org
BUG=

Review URL: https://codereview.chromium.org/17076003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15149 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

include/v8.h

@@ -490,10 +490,10 @@ template <class T> class Persistent // NOLINT
  public:
 #ifndef V8_USE_UNSAFE_HANDLES
   V8_INLINE(Persistent()) : val_(0) { }
-  V8_INLINE(~Persistent()) {
   // TODO(dcarney): add this back before cutover.
-    // Dispose();
-  }
+//  V8_INLINE(~Persistent()) {
+//  Dispose();
+//  }
   V8_INLINE(bool IsEmpty() const) { return val_ == 0; }
   // TODO(dcarney): remove somehow before cutover
   // The handle should either be 0, or a pointer to a live cell.