Replace adjustment of previous visual rects on scroll with normal paint invalidation

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

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999 Lars Knoll <knoll@kde.org>
  *                     1999 Antti Koivisto <koivisto@kde.org>
  *                     2000 Dirk Mueller <mueller@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  *           (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
@@ skipping 1893 matching lines @@
   ASSERT(!layoutSizeFixedToFrameSize());
 
   setLayoutSizeInternal(size);
 }
 
 void FrameView::didScrollTimerFired(TimerBase*) {
   if (m_frame->document() && !m_frame->document()->layoutViewItem().isNull())
     m_frame->document()->fetcher()->updateAllImageResourcePriorities();
 }
 
-void FrameView::updateLayersAndCompositingAfterScrollIfNeeded(
-    const ScrollOffset& scrollDelta) {
+void FrameView::updateLayersAndCompositingAfterScrollIfNeeded() {
   // Nothing to do after scrolling if there are no fixed position elements.
   if (!hasViewportConstrainedObjects())
     return;
 
   // Update sticky position objects which are stuck to the viewport.
   for (const auto& viewportConstrainedObject : *m_viewportConstrainedObjects) {
     LayoutObject* layoutObject = viewportConstrainedObject;
     PaintLayer* layer = toLayoutBoxModelObject(layoutObject)->layer();
     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);
+      layer->updateLayerPositionsAfterOverflowScroll();
+      layoutObject->setMayNeedPaintInvalidationSubtree();
     }
   }
 
   // If there fixed position elements, scrolling may cause compositing layers to
   // change.  Update widget and layer positions after scrolling, but only if
   // we're not inside of layout.
   if (!m_nestedLayoutCount) {
     updateWidgetGeometries();
     LayoutViewItem layoutViewItem = this->layoutViewItem();
     if (!layoutViewItem.isNull())
@@ skipping 1858 matching lines @@
     ASSERT_NOT_REACHED();
   }
 
   m_scrollOffset = offset;
 
   if (!scrollbarsSuppressed())
     m_pendingScrollDelta += scrollDelta;
 
   if (scrollTypeClearsFragmentAnchor(scrollType))
     clearFragmentAnchor();
-  updateLayersAndCompositingAfterScrollIfNeeded(scrollDelta);
+  updateLayersAndCompositingAfterScrollIfNeeded();
 
   Document* document = m_frame->document();
   document->enqueueScrollEventForNode(document);
 
   m_frame->eventHandler().dispatchFakeMouseMoveEventSoon();
   Page* page = frame().page();
   if (page)
     page->chromeClient().clearToolTip(*m_frame);
 
   LayoutViewItem layoutViewItem = document->layoutViewItem();
@@ skipping 1075 matching lines @@
        reason < MainThreadScrollingReason::kMainThreadScrollingReasonCount;
        ++reason) {
     if (m_mainThreadScrollingReasonsCounter[reason] > 0) {
       reasons |= 1 << (reason - 1);
     }
   }
   return reasons;
 }
 
 }  // namespace blink