Revert "Re-land deferred compositing updates with fixed assumptions"

LayoutTests/fast/events/touch/touch-rect-crash-on-unpromote-layer.html

Index: LayoutTests/fast/events/touch/touch-rect-crash-on-unpromote-layer.html
diff --git a/LayoutTests/fast/events/touch/touch-rect-crash-on-unpromote-layer.html b/LayoutTests/fast/events/touch/touch-rect-crash-on-unpromote-layer.html
index 1a65a5d5f9f00ca150c3060063309712eae3c625..95c96cc90b8bfed7445964fdae399c0e3e8ae8c9 100644
--- a/LayoutTests/fast/events/touch/touch-rect-crash-on-unpromote-layer.html
+++ b/LayoutTests/fast/events/touch/touch-rect-crash-on-unpromote-layer.html
@@ -25,12 +25,8 @@
     var layer = document.getElementById('layer');
     layer.addEventListener('touchstart', function() {});
 
-    // Ensure we've done a layout, updated compositing, and we have a hit rect on this composited layer.
+    // Ensure we've done a layout and we have a hit rect on this composited layer.
     var x = layer.offsetTop;
-
-    if (window.internals)
-        window.internals.forceCompositingUpdate(document);
-
     var rects;
     if (window.internals) {
       rects = window.internals.touchEventTargetLayerRects(document);
@@ -41,8 +37,8 @@
     // Make the layer non-composited
     layer.className = '';
 
-    // Verify we now have a hit rect on the document.
-    // (layout and compositing update are done by touchEventTargetLayerRects().)
+    // Force layout and verify we now have a hit rect on the document.
+    x = layer.offsetTop;
     if (window.internals) {
       rects = window.internals.touchEventTargetLayerRects(document);
       shouldBe("rects.length", "1");