Bug 1510724 Part 1 - Add accessor for wrapped PLDHashTable operations, r=froydnj.

--HG--
extra : rebase_source : 49cb109c6c0b630feab52e82a711249b5c2443ea

Author: bhackett1024

xpcom/ds/PLDHashTable.h

@@ -435,6 +435,12 @@ class PLDHashTable {
     return mozilla::recordreplay::UnwrapPLDHashTableCallbacks(mOps);
   }
 
+  // Provide access to the raw ops to internal record/replay structures.
+  const PLDHashTableOps* RecordReplayWrappedOps() const
+  {
+    return mOps;
+  }
+
   // Size in entries (gross, not net of free and removed sentinels) for table.
   // This can be zero if no elements have been added yet, in which case the
   // entry storage will not have yet been allocated.