Implement ::placeholder CSS selector.

third_party/WebKit/Source/core/css/RuleSet.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc.
  * All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 170 matching lines @@
     return &m_linkPseudoClassRules;
   }
   const HeapVector<RuleData>* cuePseudoRules() const {
     ASSERT(!m_pendingRules);
     return &m_cuePseudoRules;
   }
   const HeapVector<RuleData>* focusPseudoClassRules() const {
     ASSERT(!m_pendingRules);
     return &m_focusPseudoClassRules;
   }
+  const HeapVector<RuleData>* placeholderPseudoRules() const {
+    DCHECK(!m_pendingRules);
+    return &m_placeholderPseudoRules;
+  }
   const HeapVector<RuleData>* universalRules() const {
     ASSERT(!m_pendingRules);
     return &m_universalRules;
   }
   const HeapVector<RuleData>* shadowHostRules() const {
     ASSERT(!m_pendingRules);
     return &m_shadowHostRules;
   }
   const HeapVector<Member<StyleRulePage>>& pageRules() const {
     ASSERT(!m_pendingRules);
@@ skipping 92 matching lines @@
     return m_pendingRules.get();
   }
 
   CompactRuleMap m_idRules;
   CompactRuleMap m_classRules;
   CompactRuleMap m_tagRules;
   CompactRuleMap m_shadowPseudoElementRules;
   HeapVector<RuleData> m_linkPseudoClassRules;
   HeapVector<RuleData> m_cuePseudoRules;
   HeapVector<RuleData> m_focusPseudoClassRules;
+  HeapVector<RuleData> m_placeholderPseudoRules;
   HeapVector<RuleData> m_universalRules;
   HeapVector<RuleData> m_shadowHostRules;
   RuleFeatureSet m_features;
   HeapVector<Member<StyleRulePage>> m_pageRules;
   HeapVector<Member<StyleRuleFontFace>> m_fontFaceRules;
   HeapVector<Member<StyleRuleKeyframes>> m_keyframesRules;
   HeapVector<MinimalRuleData> m_deepCombinatorOrShadowPseudoRules;
   HeapVector<MinimalRuleData> m_contentPseudoElementRules;
   HeapVector<MinimalRuleData> m_slottedPseudoElementRules;
 
   MediaQueryResultList m_viewportDependentMediaQueryResults;
   MediaQueryResultList m_deviceDependentMediaQueryResults;
 
   unsigned m_ruleCount;
   Member<PendingRuleMaps> m_pendingRules;
 
 #ifndef NDEBUG
   HeapVector<RuleData> m_allRules;
 #endif
 };
 
 }  // namespace blink
 
 #endif  // RuleSet_h