Fix tap target consistency with link highlighting and hover/active

LayoutTests/compositing/gestures/resources/link-highlight-helper.js

Index: LayoutTests/compositing/gestures/resources/link-highlight-helper.js
diff --git a/LayoutTests/compositing/gestures/resources/link-highlight-helper.js b/LayoutTests/compositing/gestures/resources/link-highlight-helper.js
index 45c2e48be1c3f9d35360a652ba0a573811db757c..9fa8c95615d97a187844a57b100e8df830478f14 100644
--- a/LayoutTests/compositing/gestures/resources/link-highlight-helper.js
+++ b/LayoutTests/compositing/gestures/resources/link-highlight-helper.js
@@ -33,3 +33,22 @@ function useMockHighlight() {
     internals.settings.setMockGestureTapHighlightsEnabled(true);
 }
 
+function testHighlightTarget(id) {
+    useMockHighlight();
+
+    var clientRect = document.getElementById('highlightTarget').getBoundingClientRect();
+    x = (clientRect.left + clientRect.right) / 2;
+    y = (clientRect.top + clientRect.bottom) / 2;
+    if (window.testRunner) {
+        testRunner.dumpAsTextWithPixelResults();
+        testRunner.waitUntilDone();
+    }
+
+    if (window.eventSender) {
+        eventSender.gestureTapDown(x, y, 30, 30);
+        eventSender.gestureShowPress(x, y, 30, 30);
+        window.setTimeout(function() { window.testRunner.notifyDone(); }, 0);
+    } else {
+        debug("This test requires eventSender");
+    }
+}