WASHINGTON, July 19 (Reuters) – Over a year after passing its first version of a bill boosting semiconductor competition with China, the U.S. Senate was due to begin voting on Tuesday on a slimmed-down version of legislation to provide more than $50 billion in subsidies for the computer chip industry. The Senate's Democratic majority leader, Chuck Schumer, announced that the first procedural vote would take place on Tuesday, calling U.S. semiconductor manufacturing a matter of national security as well as a source of jobs. Senate aides said the goal is to pass the bill early next week. The would send…