Twitch is said to believe that Google can help the company become what it wants to be — the definitive platform for watching and streaming live video gaming. The company raised $20 million from investors in 2013 and is likely to turn a profit this year. But capital isn’t enough to allow Twitch to scale its technology and infrastructure to keep pace with its growth. It had plenty of offers from venture capitalists looking to give it more money, said the source, but what it needs is a partner that can help it handle massive amounts of live and user-generated video on a global scale.