NOT FOR REVIEW - Update comp-scrolling state at a well defined point in the pipeline.

LayoutTests/compositing/overflow/build-paint-order-lists.html

Index: LayoutTests/compositing/overflow/build-paint-order-lists.html
diff --git a/LayoutTests/compositing/overflow/build-paint-order-lists.html b/LayoutTests/compositing/overflow/build-paint-order-lists.html
index efe610f8bebf69d028c25cba50a6f78eaa298fe1..a9ca7390a4272bdbdefcb27e3f3e4e9fb9837e5d 100644
--- a/LayoutTests/compositing/overflow/build-paint-order-lists.html
+++ b/LayoutTests/compositing/overflow/build-paint-order-lists.html
@@ -80,6 +80,9 @@
     }
 
     function testPermutation(count) {
+      if (!window.internals)
+        return;
+
       var container = document.getElementById('container');
       // Here we want to compare paint order lists before and after promotion
       // to the actual stacking order as determined by hit-testing. So we
@@ -93,13 +96,15 @@
       container.style.webkitTransform = 'translateZ(0px)';
       document.body.offsetTop;
 
-      window.internals.settings.setAcceleratedCompositingForOverflowScrollEnabled(false);
+      window.internals.setNeedsCompositedScrolling(container, 
+          window.internals.FORCE_COMPOSITED_SCROLLING_OFF);

[hartmanng, 2013/05/02 14:04:01]

and here, am I missing something or is this just a rebase error?

       container.style.webkitTransform = '';
 
       var oldStackingOrder = getStackingOrder(container);
       var oldPaintOrder = getPaintOrder(container);
 
-      window.internals.settings.setAcceleratedCompositingForOverflowScrollEnabled(true);
+      window.internals.setNeedsCompositedScrolling(container, 
+          window.internals.FORCE_COMPOSITED_SCROLLING_ON);
       container.style.webkitTransform = 'translateZ(0px)';
 
       var newStackingOrder = getStackingOrder(container);