You can count on these ultra-reliable dividend stocks to boost your passive income no matter what the stock market is doing.As companies mature, they often choose to implement a dividend as a way to directly reward shareholders. On the other hand, smaller up-and-coming companies will want to put all the dry powder possible into their ideas to make them succeed.Coca-Cola (KO -0.52%), Procter & Gamble (PG 0.21%), and Sherwin-Williams (SHW 0.58%) are three industry-leading companies that have been around for o ...