Add automation scripts for the new pointer event touch action wpl tests.

BUG=626101

Review-Url: https://codereview.chromium.org/2322073002
Cr-Commit-Position: refs/heads/master@{#417406}

third_party/WebKit/LayoutTests/imported/wpt_automation/pointerevents/pointerevent_touch-action-pan-down-css_touch-manual-automation.js

+importAutomationScript('/pointerevents/pointerevent_common_input.js');
+
+function inject_input() {
+  return touchScrollInTarget('#target0', 'up').then(function() {
+    return touchScrollInTarget('#target0', 'right');
+  }).then(function() {
+    return touchScrollInTarget('#target0', 'down');
+  }).then(function() {
+    return touchTapInTarget('#btnComplete');
+  });
+}

third_party/WebKit/LayoutTests/imported/wpt_automation/pointerevents/pointerevent_touch-action-pan-left-css_touch-manual-automation.js

+importAutomationScript('/pointerevents/pointerevent_common_input.js');
+
+function inject_input() {
+  return touchScrollInTarget('#target0', 'down').then(function() {
+    return touchScrollInTarget('#target0', 'right');
+  }).then(function() {
+    return touchScrollInTarget('#target0', 'left');
+  }).then(function() {
+    return touchTapInTarget('#btnComplete');
+  });
+}
+

third_party/WebKit/LayoutTests/imported/wpt_automation/pointerevents/pointerevent_touch-action-pan-right-css_touch-manual-automation.js

+importAutomationScript('/pointerevents/pointerevent_common_input.js');
+
+function inject_input() {
+  return touchScrollInTarget('#target0', 'down').then(function() {
+    return touchScrollInTarget('#target0', 'left');
+  }).then(function() {
+    return touchScrollInTarget('#target0', 'right');
+  }).then(function() {
+    return touchTapInTarget('#btnComplete');
+  });
+}
+

third_party/WebKit/LayoutTests/imported/wpt_automation/pointerevents/pointerevent_touch-action-pan-up-css_touch-manual-automation.js

+importAutomationScript('/pointerevents/pointerevent_common_input.js');
+
+function inject_input() {
+  return touchScrollInTarget('#target0', 'down').then(function() {
+    return touchScrollInTarget('#target0', 'right');
+  }).then(function() {
+    return touchScrollInTarget('#target0', 'up');
+  }).then(function() {
+    return touchTapInTarget('#btnComplete');
+  });
+}