Add a WebDocument::watchCssSelectors(selectors)

Source/core/css/DocumentRuleSets.cpp

Index: Source/core/css/DocumentRuleSets.cpp
diff --git a/Source/core/css/DocumentRuleSets.cpp b/Source/core/css/DocumentRuleSets.cpp
index 9a595b4365e0ad958434aa6d62ca430068e30c9b..470430db0e15820c31ff059a41384ddd893a6d0d 100644
--- a/Source/core/css/DocumentRuleSets.cpp
+++ b/Source/core/css/DocumentRuleSets.cpp
@@ -74,13 +74,14 @@ DocumentRuleSets::~DocumentRuleSets()
 {
 }
 
-void DocumentRuleSets::initUserStyle(StyleSheetCollections* styleSheetCollection, const MediaQueryEvaluator& medium, StyleResolver& resolver)
+void DocumentRuleSets::initUserStyle(StyleSheetCollections* styleSheetCollection, const Vector<RefPtr<StyleRule> >& watchedSelectors, const MediaQueryEvaluator& medium, StyleResolver& resolver)
 {
     OwnPtr<RuleSet> tempUserStyle = RuleSet::create();
     if (CSSStyleSheet* pageUserSheet = styleSheetCollection->pageUserSheet())
         tempUserStyle->addRulesFromSheet(pageUserSheet->contents(), medium, &resolver);
     collectRulesFromUserStyleSheets(styleSheetCollection->injectedUserStyleSheets(), *tempUserStyle, medium, resolver);
     collectRulesFromUserStyleSheets(styleSheetCollection->documentUserStyleSheets(), *tempUserStyle, medium, resolver);
+    collectRulesFromWatchedSelectors(watchedSelectors, *tempUserStyle);
     if (tempUserStyle->ruleCount() > 0 || tempUserStyle->pageRules().size() > 0)
         m_userStyle = tempUserStyle.release();
 }
@@ -93,6 +94,12 @@ void DocumentRuleSets::collectRulesFromUserStyleSheets(const Vector<RefPtr<CSSSt
     }
 }
 
+void DocumentRuleSets::collectRulesFromWatchedSelectors(const Vector<RefPtr<StyleRule> >& watchedSelectors, RuleSet& userStyle)
+{
+    for (unsigned i = 0; i < watchedSelectors.size(); ++i)
+        userStyle.addStyleRule(watchedSelectors[i].get(), RuleHasNoSpecialState);
+}
+
 void DocumentRuleSets::resetAuthorStyle()
 {
     m_shadowDistributedRules.clear();