Sibling invalidation sets

third_party/WebKit/Source/core/css/invalidation/InvalidationSet.cpp

 /*
  * Copyright (C) 2014 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 251 matching lines @@
 void InvalidationSet::show() const
 {
     RefPtr<TracedValue> value = TracedValue::create();
     value->beginArray("InvalidationSet");
     toTracedValue(value.get());
     value->endArray();
     fprintf(stderr, "%s\n", value->asTraceFormat().ascii().data());
 }
 #endif // NDEBUG
 
+SiblingInvalidationSet::SiblingInvalidationSet()
+    : m_maxDirectAdjacentSelectors(1)
+    , m_descendantInvalidationSet(DescendantInvalidationSet::create())
+{
+}
+
+void SiblingInvalidationSet::combine(const SiblingInvalidationSet& other)
+{
+    m_maxDirectAdjacentSelectors = std::max(m_maxDirectAdjacentSelectors, other.m_maxDirectAdjacentSelectors);
+    m_descendantInvalidationSet->combine(other.descendants());
+
+    InvalidationSet::combine(other);
+}
+
 } // namespace blink