Backend for css rule tracking

third_party/WebKit/Source/core/css/ElementRuleCollector.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc.
  * All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
@@ skipping 23 matching lines @@
 #include "core/css/CSSKeyframesRule.h"
 #include "core/css/CSSMediaRule.h"
 #include "core/css/CSSRuleList.h"
 #include "core/css/CSSSelector.h"
 #include "core/css/CSSStyleRule.h"
 #include "core/css/CSSStyleSheet.h"
 #include "core/css/CSSSupportsRule.h"
 #include "core/css/StylePropertySet.h"
 #include "core/css/resolver/StyleResolver.h"
 #include "core/css/resolver/StyleResolverStats.h"
+#include "core/css/resolver/StyleRuleUsageTracker.h"
 #include "core/dom/StyleEngine.h"
 #include "core/dom/shadow/ShadowRoot.h"
 #include "core/style/StyleInheritedData.h"
-#include <algorithm>
 
 namespace blink {
 
 ElementRuleCollector::ElementRuleCollector(const ElementResolveContext& context,
                                            const SelectorFilter& filter,
                                            ComputedStyle* style)
     : m_context(context),
       m_selectorFilter(filter),
       m_style(style),
       m_pseudoStyleRequest(PseudoIdNone),
@@ skipping 306 matching lines @@
   // To check whether a given RuleSet has any rule matching a given element,
   // should not see the element's treescope. Because RuleSet has no information
   // about "scope".
   MatchRequest matchRequest(ruleSet);
   collectMatchingRules(matchRequest);
   collectMatchingShadowHostRules(matchRequest);
 
   return !m_matchedRules.isEmpty();
 }
 
+void ElementRuleCollector::addMatchedRulesToTracker(
+    StyleRuleUsageTracker* tracker) const {
+  for (auto matchedRule : m_matchedRules)
+    tracker->track(matchedRule.ruleData()->rule());
+}
+
 }  // namespace blink