Use querySelector instead of getElementById

third_party/WebKit/LayoutTests/imported/wpt_automation/pointerevents/pointerevent_touch-action-mouse-manual-automation.js

 importAutomationScript('/pointerevents/pointerevent_common_input.js');
 
 function inject_input() {
-  return mouseClickInTarget('target0').then(function() {
+  return mouseClickInTarget('#target0').then(function() {
     return mouseWheelScroll('down');
   }).then(function() {
     return mouseWheelScroll('right');
   });
 }