Fix paint property under-invalidation checking about reference filters

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 3001 matching lines @@
   if (layoutObject()->hasReflection() && layoutObject()->isBox()) {
     BoxReflection reflection = boxReflectionForPaintLayer(*this, style);
     filterOperations.operations().append(
         BoxReflectFilterOperation::create(reflection));
   }
   return filterOperations;
 }
 
 CompositorFilterOperations
 PaintLayer::createCompositorFilterOperationsForFilter(
-    const ComputedStyle& style) {
+    const ComputedStyle& style,
+    FilterOperations* styleFilterOperations) {
   FloatRect zoomedReferenceBox;
   if (style.filter().hasReferenceFilter())
     zoomedReferenceBox = boxForFilterOrMask();
   FilterEffectBuilder builder(enclosingNode(), zoomedReferenceBox,
                               style.effectiveZoom());
-  return builder.buildFilterOperations(addReflectionToFilterOperations(style));
+  FilterOperations operations = addReflectionToFilterOperations(style);
+  if (styleFilterOperations)
+    *styleFilterOperations = operations;
+  return builder.buildFilterOperations(operations);
 }
 
 CompositorFilterOperations
 PaintLayer::createCompositorFilterOperationsForBackdropFilter(
     const ComputedStyle& style) {
   FloatRect zoomedReferenceBox;
   if (style.backdropFilter().hasReferenceFilter())
     zoomedReferenceBox = boxForFilterOrMask();
   FilterEffectBuilder builder(enclosingNode(), zoomedReferenceBox,
                               style.effectiveZoom());
@@ skipping 212 matching lines @@
 }
 
 void showLayerTree(const blink::LayoutObject* layoutObject) {
   if (!layoutObject) {
     LOG(INFO) << "Cannot showLayerTree. Root is (nil)";
     return;
   }
   showLayerTree(layoutObject->enclosingLayer());
 }
 #endif