Mercury News: In Silicon Valley’s famous “trees vs. solar panels” battle, the trees have won. Gov. Arnold Schwarzenegger on Tuesday signed into law a bill that guarantees if California property owners plant a tree before a neighbor installs solar panels on their roof, then the neighbor can’t require the tree to be cut or trimmed, even if it grows to cast shade on the panels. State Sen. Joe Simitian, D-Palo Alto, wrote the bill in response to a Sunnyvale case that made national news …