Pass correct client coordinates for mouse events synthesized from a GestureTap

LayoutTests/fast/events/touch/gesture/gesture-tap-scrolled.html

Index: LayoutTests/fast/events/touch/gesture/gesture-tap-scrolled.html
diff --git a/LayoutTests/fast/events/touch/gesture/gesture-tap-frame-scrolled.html b/LayoutTests/fast/events/touch/gesture/gesture-tap-scrolled.html
similarity index 64%
copy from LayoutTests/fast/events/touch/gesture/gesture-tap-frame-scrolled.html
copy to LayoutTests/fast/events/touch/gesture/gesture-tap-scrolled.html
index 90b80d3ad44684aabc31b818a9fbeb504a062937..24aa3c22fb871f6d3dc04489dfacb45e238f29c8 100644
--- a/LayoutTests/fast/events/touch/gesture/gesture-tap-frame-scrolled.html
+++ b/LayoutTests/fast/events/touch/gesture/gesture-tap-scrolled.html
@@ -7,41 +7,38 @@ html, body {
 body {
   height: 1000px;
 }
-#target {
-  width: 50px;
-  height: 50px;
-}
 </style>
-<iframe frameborder=0 id="target" src="resources/event-delegator.html"></iframe>
 <div id=console></div>
 <script>
 var event;
-window.scrollTo(0, 3);
-var rect = target.getBoundingClientRect();
+var scrollOffset = 42;
+window.scrollTo(0, scrollOffset);
 var point = {
-    x: rect.left + rect.width / 2,
-    y: rect.top + rect.height / 2 - 3
+    x: 50,
+    y: 50
 };
 
 var eventReceived = {};
 
 function onEventInFrame(e) {

[Rick Byers, 2014/10/10 00:39:35]

nit: just call this onEvent (onEventInFrame is a special name the iframe
event-delegator looks for - we should avoid potential confusion)

[Zeeshan Qureshi, 2014/10/10 00:47:23]

oops, missed updating this.

-    debug("Received " + e.type + " in child frame");
+    debug("Received " + e.type + " in page");
     event = e;
     eventReceived[e.type] = true;
     shouldBe("event.screenX", "point.x");
     shouldBe("event.screenY", "point.y");
-    shouldBe("event.clientX", "50 / 2");
-    shouldBe("event.clientY", "50 / 2 + 7");
+    shouldBe("event.clientX", "point.x");
+    shouldBe("event.clientY", "point.y");
 }
 
-description("Verifies that a tap occuring in a scrolled iframe has the correct co-ordinates");
+var eventTypes = ['mousemove', 'mousedown', 'mouseup', 'click'];
+for (var i = 0; i < eventTypes.length; i++)
+    document.addEventListener(eventTypes[i],onEventInFrame);
+
+description("Verifies that a tap occuring in a scrolled page has the correct co-ordinates");
 
 if (window.eventSender) {
     jsTestIsAsync = true;
-    target.onload = function() {
-        target.contentWindow.scrollTo(0, 7);
-
+    window.onload = function() {
         debug("Sending GestureTapDown to " + point.x + "," + point.y);
         eventSender.gestureTapDown(point.x, point.y);