Add MoveOnlyTypeForCPP03 to UniquePersistent for compatibility with Chromium.

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index e4a8be6aea4f63071d21b633c815f1ac306f23f4..04805e47630b04e221f592fb27fdfde521a76063 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -793,6 +793,11 @@ class UniquePersistent : public PersistentBase<T> {
    */
   UniquePersistent Pass() { return UniquePersistent(RValue(this)); }
 
+  /*
+   * For compatibility with Chromium's base::Bind (base::Passed).
+   */
+  typedef void MoveOnlyTypeForCPP03;
+
  private:
   UniquePersistent(UniquePersistent&);
   void operator=(UniquePersistent&);