am b6e18701: (-s ours) am 159f22e8: am 92e4a90e: (-s ours) am 17e38ec9: DO NOT MERGE Prevent integer wrap around for malloc size when creating a SkRegion

* commit 'b6e18701a85015d6ccc77e50ed55d091068dc565':
  DO NOT MERGE Prevent integer wrap around for malloc size when creating a SkRegion