WASHINGTON/SAN FRANCISCO (Reuters) – The Federal Reserve says it will depend on straightforward data analysis in deciding when to raise U.S. interest rates. The BEA now says GDP shrank only 0.2 percent over the first three months of the year, not 0.7 percent. The revision may not change the Fed’s policy path, or greatly alter the economic outlook that central bankers just published last week but that’s only because the consensus about how to measure U.S. economic growth has begun to fracture.