Set needs paint property update when dirtying descendant-dependent properties.

third_party/WebKit/Source/core/paint/PaintLayer.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@web.de>
@@ skipping 613 matching lines @@
   // of the "visible contents" of the parent, so we need to dirty it.
   if (!isSelfPaintingLayer())
     parent()->dirtyVisibleContentStatus();
 }
 
 void PaintLayer::markAncestorChainForDescendantDependentFlagsUpdate() {
   for (PaintLayer* layer = this; layer; layer = layer->parent()) {
     if (layer->m_needsDescendantDependentFlagsUpdate)
       break;
     layer->m_needsDescendantDependentFlagsUpdate = true;
+
+    if (RuntimeEnabledFeatures::slimmingPaintInvalidationEnabled())
+      layer->layoutObject()->setNeedsPaintPropertyUpdate();
   }
 }
 
 // FIXME: this is quite brute-force. We could be more efficient if we were to
 // track state and update it as appropriate as changes are made in the layout
 // tree.
 void PaintLayer::updateScrollingStateAfterCompositingChange() {
   TRACE_EVENT0("blink",
                "PaintLayer::updateScrollingStateAfterCompositingChange");
   m_isAllScrollingContentComposited = true;
@@ skipping 361 matching lines @@
 }
 
 void PaintLayer::setNeedsCompositingInputsUpdate() {
   setNeedsCompositingInputsUpdateInternal();
 
   // TODO(chrishtr): These are a bit of a heavy hammer, because not all
   // things which require compositing inputs update require a descendant-
   // dependent flags udpate. Reduce call sites after SPv2 launch allows
   /// removal of CompositingInputsUpdater.
   markAncestorChainForDescendantDependentFlagsUpdate();
-  if (RuntimeEnabledFeatures::slimmingPaintV2Enabled()) {
-    // This update is needed in order to re-compute sticky position constraints,
-    // not for any other reason.
-    layoutObject()->setNeedsPaintPropertyUpdate();
-  }
 }
 
 void PaintLayer::setNeedsCompositingInputsUpdateInternal() {
   m_needsAncestorDependentCompositingInputsUpdate = true;
 
   for (PaintLayer* current = this;
        current && !current->m_childNeedsCompositingInputsUpdate;
        current = current->parent())
     current->m_childNeedsCompositingInputsUpdate = true;
 
@@ skipping 2224 matching lines @@
 }
 
 void showLayerTree(const blink::LayoutObject* layoutObject) {
   if (!layoutObject) {
     LOG(INFO) << "Cannot showLayerTree. Root is (nil)";
     return;
   }
   showLayerTree(layoutObject->enclosingLayer());
 }
 #endif