On some webpages, touch scrolling speed is too slow / fast

LayoutTests/fast/events/touch/gesture/touch-gesture-scroll-div-zoomed.html

Index: LayoutTests/fast/events/touch/gesture/touch-gesture-scroll-div-zoomed.html
diff --git a/LayoutTests/fast/events/touch/gesture/touch-gesture-scroll-div.html b/LayoutTests/fast/events/touch/gesture/touch-gesture-scroll-div-zoomed.html
similarity index 86%
copy from LayoutTests/fast/events/touch/gesture/touch-gesture-scroll-div.html
copy to LayoutTests/fast/events/touch/gesture/touch-gesture-scroll-div-zoomed.html
index f5750fc69fe1c7262bdaedb6b05c6444ff30a15d..beeacceeddcac19ca25045c17fbf9069f67049e1 100644
--- a/LayoutTests/fast/events/touch/gesture/touch-gesture-scroll-div.html
+++ b/LayoutTests/fast/events/touch/gesture/touch-gesture-scroll-div-zoomed.html
@@ -70,8 +70,8 @@ td {
 var movingdiv;
 var expectedGesturesTotal = 2;
 var gesturesOccurred = 0;
-var scrollAmountX = ['90', '90'];
-var scrollAmountY = ['0', '95'];
+var scrollAmountX = ['80', '80'];
+var scrollAmountY = ['0', '32'];
 var wheelEventsOccurred = 0;
 var expectedWheelEventsOccurred = ['0', '0'];
 var scrollEventsOccurred = 0;
@@ -81,8 +81,10 @@ var scrolledElement = 'movingdiv'
 function firstGestureScroll()
 {
     debug("first gesture");
-    eventSender.gestureScrollBegin(95, 12);
-    eventSender.gestureScrollUpdate(-90, 0);
+
+    window.internals.setZoomFactor(0.5);
+    eventSender.gestureScrollBegin(45, 12);
+    eventSender.gestureScrollUpdate(-40, 0);
     eventSender.gestureScrollEnd(0, 0);
 
     // Wait for layout.
@@ -92,8 +94,10 @@ function firstGestureScroll()
 function secondGestureScroll()
 {
     debug("second gesture");
-    eventSender.gestureScrollBegin(12, 97);
-    eventSender.gestureScrollUpdate(0, -95);
+
+    window.internals.setZoomFactor(1.25);
+    eventSender.gestureScrollBegin(12, 47);
+    eventSender.gestureScrollUpdate(0, -40);
     eventSender.gestureScrollEnd(0, 0);
 
     // Wait for layout.
@@ -110,7 +114,7 @@ function runTest()
     window.addEventListener("mousewheel", recordWheel);
 
     if (window.eventSender) {
-        description('This tests gesture event scrolling of an overflow div.');
+        description('This tests gesture event scrolling of an overflow div with browser zoom.');
 
         if (checkTestDependencies())
             firstGestureScroll();