Update automation scripts for wpt tests

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

Index: third_party/WebKit/LayoutTests/imported/wpt_automation/pointerevents/pointerevent_common_input.js
diff --git a/third_party/WebKit/LayoutTests/imported/wpt_automation/pointerevents/pointerevent_common_input.js b/third_party/WebKit/LayoutTests/imported/wpt_automation/pointerevents/pointerevent_common_input.js
index 2d1456db32e6873e4c4eb03b288eef60cfd25e95..1c07ed0205e218351e9713f8f76e4f4b9bb3ff81 100644
--- a/third_party/WebKit/LayoutTests/imported/wpt_automation/pointerevents/pointerevent_common_input.js
+++ b/third_party/WebKit/LayoutTests/imported/wpt_automation/pointerevents/pointerevent_common_input.js
@@ -41,6 +41,7 @@ function mouseMoveIntoTarget(targetSelector, targetFrame) {
   }
   return new Promise(function(resolve, reject) {
     if (window.eventSender) {
+      scrollPageIfNeeded(targetSelector, targetDocument);
       var target = targetDocument.querySelector(targetSelector);
       var targetRect = target.getBoundingClientRect();
       eventSender.mouseMoveTo(frameLeft + targetRect.left + boundaryOffset, frameTop + targetRect.top + boundaryOffset);
@@ -51,6 +52,28 @@ function mouseMoveIntoTarget(targetSelector, targetFrame) {
   });
 }
 
+function mouseButtonPress(button) {
+  return new Promise(function(resolve, reject) {
+    if (window.eventSender) {
+      eventSender.mouseDown(button);
+      resolve();
+   } else {
+      reject();
+    }
+  });
+}
+
+function mouseButtonRelease(button) {
+  return new Promise(function(resolve, reject) {
+    if (window.eventSender) {
+      eventSender.mouseUp(button);
+      resolve();
+   } else {
+      reject();
+    }
+  });
+}
+
 function mouseClickInTarget(targetSelector, targetFrame) {
   return mouseMoveIntoTarget(targetSelector, targetFrame).then(function() {
     return new Promise(function(resolve, reject) {