MOZ_COUNT_CTOR(FrameHashTable);
FrameHashTable::FrameHashTable(PRUint32 aNumBuckets){  mTable = PL_NewHashTable(aNumBuckets, (PLHashFunction)HashKey,                           (PLHashComparator)CompareKeys,                           (PLHashComparator)nsnull,                           nsnull, nsnull);}