By Lisa Baertlein and Martinne Geller BOCA RATON, Florida (Reuters) - Investors are growing impatient with the makers of global brands like Cadbury chocolate, Campbell Soup and Tide laundry detergent, as these stalwart consumer products companies try to boost profits through cost cuts and brand makeovers while smaller rivals take risks and grab market share. Organic and soy milk seller WhiteWave Foods Co , privately owned yogurt maker Chobani Greek and Keurig coffee brewer seller Green Mountain Coffee Roasters Inc have shaken up their categories and chalked up enviable growth while big companies such as ConAgra Foods Inc , Danone S.A. and General Mills Inc struggle.