Release mouse pointer capture when it starts drag

third_party/WebKit/LayoutTests/external/wpt_automation/pointerevents/html/pointerevent_drag_interaction-manual-automation.js

Index: third_party/WebKit/LayoutTests/external/wpt_automation/pointerevents/html/pointerevent_drag_interaction-manual-automation.js
diff --git a/third_party/WebKit/LayoutTests/external/wpt_automation/pointerevents/html/pointerevent_drag_interaction-manual-automation.js b/third_party/WebKit/LayoutTests/external/wpt_automation/pointerevents/html/pointerevent_drag_interaction-manual-automation.js
new file mode 100644
index 0000000000000000000000000000000000000000..abc25c3aa5b0b91bb3eb7158098a68fac6432ba6
--- /dev/null
+++ b/third_party/WebKit/LayoutTests/external/wpt_automation/pointerevents/html/pointerevent_drag_interaction-manual-automation.js
@@ -0,0 +1,17 @@
+importAutomationScript('/pointerevents/pointerevent_common_input.js');
+
+function inject_input() {
+  return new Promise(function(resolve, reject) {
+      for (var i=0; i<3; i++) {
+          var target0Rect = document.querySelector('#target0').getBoundingClientRect();
+          var target1Rect = document.querySelector('#target1').getBoundingClientRect();
+
+          eventSender.mouseMoveTo(target0Rect.left + target0Rect.width/2, target0Rect.top + target0Rect.height/2);
+          eventSender.mouseDown();
+          eventSender.mouseMoveTo(target0Rect.left + target0Rect.width/2, target0Rect.top + 2*target0Rect.height/3);
+          eventSender.mouseMoveTo(target1Rect.left + target1Rect.width/2, target1Rect.top + target1Rect.height/2);
+          eventSender.mouseUp();
+      }
+      resolve();
+  });
+}