Handle resize in PaintPropertyTreeBuilder::updateForObjectSizeAndLocation()

third_party/WebKit/Source/core/paint/PaintLayerScrollableArea.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights
  * reserved.
  *
  * Portions are Copyright (C) 1998 Netscape Communications Corporation.
  *
  * Other contributors:
  *   Robert O'Callahan <roc+@cs.cmu.edu>
  *   David Baron <dbaron@fas.harvard.edu>
  *   Christian Biesinger <cbiesinger@gmail.com>
@@ skipping 545 matching lines @@
 }
 
 int PaintLayerScrollableArea::visibleWidth() const {
   return layer()->size().width();
 }
 
 IntSize PaintLayerScrollableArea::contentsSize() const {
   return IntSize(pixelSnappedScrollWidth(), pixelSnappedScrollHeight());
 }
 
+void PaintLayerScrollableArea::contentsResized() {
+  ScrollableArea::contentsResized();
+  // Need to update the bounds of the scroll property.
+  box().setNeedsPaintPropertyUpdate();
+}
+
 bool PaintLayerScrollableArea::isScrollable() const {
   return scrollsOverflow();
 }
 
 IntPoint PaintLayerScrollableArea::lastKnownMousePosition() const {
   return box().frame() ? box().frame()->eventHandler().lastKnownMousePosition()
                        : IntPoint();
 }
 
 bool PaintLayerScrollableArea::scrollAnimatorEnabled() const {
   if (Settings* settings = box().frame()->settings())
     return settings->getScrollAnimatorEnabled();
   return false;
 }
 
 bool PaintLayerScrollableArea::shouldSuspendScrollAnimations() const {
   LayoutView* view = box().view();
   if (!view)
     return true;
   return view->frameView()->shouldSuspendScrollAnimations();
 }
 
 void PaintLayerScrollableArea::scrollbarVisibilityChanged() {
   updateScrollbarEnabledState();
 
   if (LayoutView* view = box().view())
     return view->clearHitTestCache();
 }
 
+void PaintLayerScrollableArea::scrollbarFrameRectChanged() {
+  // Size of non-overlay scrollbar affects overflow clip rect.
+  if (!hasOverlayScrollbars())
+    box().setNeedsPaintPropertyUpdate();
+}
+
 bool PaintLayerScrollableArea::scrollbarsCanBeActive() const {
   LayoutView* view = box().view();
   if (!view)
     return false;
   return view->frameView()->scrollbarsCanBeActive();
 }
 
 IntRect PaintLayerScrollableArea::scrollableAreaBoundingBox() const {
   return box().absoluteBoundingBoxRect(TraverseDocumentBoundaries);
 }
@@ skipping 1513 matching lines @@
 
 void PaintLayerScrollableArea::DelayScrollOffsetClampScope::
     clampScrollableAreas() {
   for (auto& scrollableArea : *s_needsClamp)
     scrollableArea->clampScrollOffsetAfterOverflowChange();
   delete s_needsClamp;
   s_needsClamp = nullptr;
 }
 
 }  // namespace blink