Move auxclick wpt test and add automation

third_party/WebKit/LayoutTests/external/wpt_automation/pointerevents/pointerevent_common_input.js

 // This file contains the commonly used functions in pointerevent tests.
 
 const scrollOffset = 20;
 const boundaryOffset = 2;
 
 function delayPromise(delay) {
   return new Promise(function(resolve, reject) {
     window.setTimeout(resolve, delay);
   });
 }
@@ skipping 79 matching lines @@
               {name: 'pointerUp', button: 'left'}
             ]
           }],
           resolve);
     } else {
       reject();
     }
   });
 }
 
-function mouseClickInTarget(targetSelector, targetFrame) {
+function mouseClickInTarget(targetSelector, targetFrame, button) {
   var targetDocument = document;
   var frameLeft = 0;
   var frameTop = 0;
+  if (button === undefined) {
+    button = 'left';
+  }
   if (targetFrame !== undefined) {
     targetDocument = targetFrame.contentDocument;
     var frameRect = targetFrame.getBoundingClientRect();
     frameLeft = frameRect.left;
     frameTop = frameRect.top;
   }
   return new Promise(function(resolve, reject) {
     if (window.chrome && chrome.gpuBenchmarking) {
       scrollPageIfNeeded(targetSelector, targetDocument);
       var target = targetDocument.querySelector(targetSelector);
       var targetRect = target.getBoundingClientRect();
       var xPosition = frameLeft + targetRect.left + boundaryOffset;
       var yPosition = frameTop + targetRect.top + boundaryOffset;
       chrome.gpuBenchmarking.pointerActionSequence(
           [{
             source: 'mouse',
             actions: [
               {name: 'pointerMove', x: xPosition, y: yPosition},
-              {name: 'pointerDown', x: xPosition, y: yPosition},
-              {name: 'pointerUp'}
+              {name: 'pointerDown', x: xPosition, y: yPosition, button: button},
+              {name: 'pointerUp', button: button}
             ]
           }],
           resolve);
     } else {
       reject();
     }
   });
 }
 
 function mouseDragInTargets(targetSelectorList) {
@@ skipping 341 matching lines @@
   });
 }
 
 {
   var pointerevent_automation = async_test("PointerEvent Automation");
   // Defined in every test and should return a promise that gets resolved when input is finished.
   inject_input().then(function() {
     pointerevent_automation.done();
   });
 }