Fixed layout tests to be scroll order agnostic

LayoutTests/fast/events/touch/touch-scaled-scrolled.html

Index: LayoutTests/fast/events/touch/touch-scaled-scrolled.html
diff --git a/LayoutTests/fast/events/touch/touch-scaled-scrolled.html b/LayoutTests/fast/events/touch/touch-scaled-scrolled.html
index 73675ded433e6862fe916f327c13e72daebf3c13..4785dc490bbef5d01e6238de825cac30b72fa5fc 100644
--- a/LayoutTests/fast/events/touch/touch-scaled-scrolled.html
+++ b/LayoutTests/fast/events/touch/touch-scaled-scrolled.html
@@ -13,9 +13,9 @@ function touched(e) {
 }
 
 function runTest() {
+    window.scrollTo(100,100);

[majidvp, 2015/08/18 20:19:18]

Why move this here? client{X,Y} should be independent of the scroll position
whether it is virtual or visual viewport that is scrolling?

I suppose it may be even better to call scrollTo before and after setting the
page scale to exercised both paths.

[bokan, 2015/08/19 17:10:45]

clientX/Y is relative to the layout viewport, meaning it depends on the visual
viewport's offset within the layout viewport. So this test depends on which
viewport we scroll first because the layout viewport has enough content that
it'll swallow the whole delta if scrolled first (so visual will have a (0, 0)
offset). Scrolling the visual viewport first will move it to a non-zero offset
so the client coordinates will differ. Does that make sense?

     if (window.internals)
         window.internals.setPageScaleFactor(2);
-    window.scrollTo(100,100);
 
     if (window.testRunner) {
         testRunner.dumpAsText();