Propagate inherited properties into slotted elements on recalc.

third_party/WebKit/Source/core/html/HTMLSlotElement.cpp

 /*
  * Copyright (C) 2015 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 27 matching lines @@
 #include "core/events/Event.h"
 #include "core/html/AssignedNodesOptions.h"
 
 namespace blink {
 
 using namespace HTMLNames;
 
 inline HTMLSlotElement::HTMLSlotElement(Document& document)
     : HTMLElement(slotTag, document)
 {
+    setHasCustomStyleCallbacks();
 }
 
 DEFINE_NODE_FACTORY(HTMLSlotElement);
 
 const WillBeHeapVector<RefPtrWillBeMember<Node>> HTMLSlotElement::getAssignedNodesForBinding(const AssignedNodesOptions& options)
 {
     updateDistribution();
     if (options.hasFlatten() && options.flatten())
         return getDistributedNodes();
     return m_assignedNodes;
@@ skipping 149 matching lines @@
 
     // Since this insertion point is no longer visible from the shadow subtree, it need to clean itself up.
     clearDistribution();
 
     if (root == insertionPoint->treeScope().rootNode())
         root->didRemoveSlot();
 
     HTMLElement::removedFrom(insertionPoint);
 }
 
+void HTMLSlotElement::willRecalcStyle(StyleRecalcChange change)
+{
+    if (change < Inherit && styleChangeType() < SubtreeStyleChange)
+        return;
+
+    for (auto& node : m_distributedNodes)
+        node->setNeedsStyleRecalc(LocalStyleChange, StyleChangeReasonForTracing::create(StyleChangeReason::PropagateInheritChangeToDistributedNodes));
+}
+
 void HTMLSlotElement::updateDistributedNodesWithFallback()
 {
     if (!m_distributedNodes.isEmpty())
         return;
     for (auto& child : NodeTraversal::childrenOf(*this)) {
         if (!child.isSlotAssignable())
             continue;
         // Insertion points are not supported as slots fallback
         if (isActiveInsertionPoint(child))
             continue;
@@ skipping 18 matching lines @@
 #if ENABLE(OILPAN)
     visitor->trace(m_assignedNodes);
     visitor->trace(m_distributedNodes);
     visitor->trace(m_distributedIndices);
     visitor->trace(m_oldDistributedNodes);
 #endif
     HTMLElement::trace(visitor);
 }
 
 } // namespace blink