Add promise to pointerevent wpt automations

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 f5282e15ac0e7134abbeaf11f54d16a967ed5c3a..bcad05ce7c397cdfd26171cdf9b7d4f26c70ba43 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
@@ -58,13 +58,35 @@ function mouseScrollLeft() {
 const scrollOffset = 30;
 const boundaryOffset = 5;
 const touchSourceType = 1;
+
 function touchTapInTarget(targetId) {
-  if (window.chrome && chrome.gpuBenchmarking) {
-    var target = document.getElementById(targetId);
-    target.scrollIntoViewIfNeeded();
-    var targetRect = target.getBoundingClientRect();
-    chrome.gpuBenchmarking.tap(targetRect.left+boundaryOffset, targetRect.top+boundaryOffset);
-  }
+  return new Promise(function(resolve, reject) {
+    if (window.chrome && chrome.gpuBenchmarking) {
+      var target = document.getElementById(targetId);
+      target.scrollIntoViewIfNeeded();
+      var targetRect = target.getBoundingClientRect();
+      chrome.gpuBenchmarking.tap(targetRect.left + boundaryOffset, targetRect.top + boundaryOffset, function() {
+        resolve();
+      });
+    } else {
+      reject();

[mustaq, 2016/08/17 15:17:49]

I think it reject the Promise if gpuBenchmarking.tap() fails to call back within
a certain time period, right?

[Navid Zolghadr, 2016/08/17 15:24:54]

I don't think we should make this distinction there. if that didn't call the
callback the test will timeout.

+    }
+  });
+}
+
+function touchScrollInTarget(targetId, direction) {
+  return new Promise(function(resolve, reject) {
+    if (window.chrome && chrome.gpuBenchmarking) {
+      var target = document.getElementById(targetId);
+      target.scrollIntoViewIfNeeded();
+      var targetRect = target.getBoundingClientRect();
+      chrome.gpuBenchmarking.smoothScrollBy(scrollOffset, function() {
+        resolve();
+      }, targetRect.left + boundaryOffset, targetRect.top + boundaryOffset, 1, direction);
+    } else {
+      reject();
+    }
+  });
 }
 
 function scrollPageIfNeeded(targetRect, startX, startY) {