Fix sticky constraints and update sticky layer positions recursively after scroll.

third_party/WebKit/Source/core/frame/FrameView.cpp

Index: third_party/WebKit/Source/core/frame/FrameView.cpp
diff --git a/third_party/WebKit/Source/core/frame/FrameView.cpp b/third_party/WebKit/Source/core/frame/FrameView.cpp
index ab8f86fc55e8d846f5d136320978ddd47213644a..7c6924f6f3f0c5b713ce24224a4362063229afd5 100644
--- a/third_party/WebKit/Source/core/frame/FrameView.cpp
+++ b/third_party/WebKit/Source/core/frame/FrameView.cpp
@@ -1622,7 +1622,7 @@ void FrameView::didScrollTimerFired(Timer<FrameView>*)
         m_frame->document()->fetcher()->updateAllImageResourcePriorities();
 }
 
-void FrameView::updateLayersAndCompositingAfterScrollIfNeeded()
+void FrameView::updateLayersAndCompositingAfterScrollIfNeeded(const DoubleSize& scrollDelta)
 {
     // Nothing to do after scrolling if there are no fixed position elements.
     if (!hasViewportConstrainedObjects())
@@ -1632,8 +1632,12 @@ void FrameView::updateLayersAndCompositingAfterScrollIfNeeded()
     for (const auto& viewportConstrainedObject : *m_viewportConstrainedObjects) {
         LayoutObject* layoutObject = viewportConstrainedObject;
         PaintLayer* layer = toLayoutBoxModelObject(layoutObject)->layer();
-        if (layoutObject->style()->position() == StickyPosition)
-            layer->updateLayerPosition();
+        if (layoutObject->style()->position() == StickyPosition) {
+            // TODO(skobes): Resolve circular dependency between scroll offset and
+            // compositing state, and remove this disabler. https://crbug.com/420741
+            DisableCompositingQueryAsserts disabler;
+            layer->updateLayerPositionsAfterOverflowScroll(scrollDelta);
+        }
     }
 
     // If there fixed position elements, scrolling may cause compositing layers to change.
@@ -3257,7 +3261,7 @@ void FrameView::setScrollOffset(const DoublePoint& offset, ScrollType scrollType
         m_pendingScrollDelta += scrollDelta;
 
     clearFragmentAnchor();
-    updateLayersAndCompositingAfterScrollIfNeeded();
+    updateLayersAndCompositingAfterScrollIfNeeded(scrollDelta);
 
     Document* document = m_frame->document();
     document->enqueueScrollEventForNode(document);