return ClientKeyFromCacheKey(nsLiteralCString(mMetaDataFile.mKey), clientKey);
return ClientKeyFromCacheKey(nsDependentCString(mDiskEntry->mKeyStart), clientKey);
NS_IMETHODIMP nsDiskCacheEntryInfo::GetKey(char ** clientKey){    NS_ENSURE_ARG_POINTER(clientKey);    return ClientKeyFromCacheKey(nsLiteralCString(mMetaDataFile.mKey), clientKey);}