Add a WebDocument::watchCssSelectors(selectors)

Source/core/rendering/style/StyleRareNonInheritedData.cpp

Index: Source/core/rendering/style/StyleRareNonInheritedData.cpp
diff --git a/Source/core/rendering/style/StyleRareNonInheritedData.cpp b/Source/core/rendering/style/StyleRareNonInheritedData.cpp
index e4d640ab9c00c38bc0e79353794b367adcc39b72..a185c73b86d94f584e8547214e9b447e491e7b92 100644
--- a/Source/core/rendering/style/StyleRareNonInheritedData.cpp
+++ b/Source/core/rendering/style/StyleRareNonInheritedData.cpp
@@ -22,6 +22,7 @@
 #include "config.h"
 #include "core/rendering/style/StyleRareNonInheritedData.h"
 
+#include "core/dom/CSSSelectorWatch.h"
 #include "core/dom/WebCoreMemoryInstrumentation.h"
 #include "core/rendering/style/ContentData.h"
 #include "core/rendering/style/RenderStyle.h"
@@ -156,6 +157,11 @@ StyleRareNonInheritedData::StyleRareNonInheritedData(const StyleRareNonInherited
 
 StyleRareNonInheritedData::~StyleRareNonInheritedData()
 {
+    if (!m_callbackSelectors.isEmpty() && m_selectorWatch.get()) {
+        for (Vector<String>::const_iterator it = m_callbackSelectors.begin(), end = m_callbackSelectors.end();
+            it != end; ++it)
+            m_selectorWatch.get()->removeSelectorMatch(*it);
+    }
 }
 
 bool StyleRareNonInheritedData::operator==(const StyleRareNonInheritedData& o) const
@@ -199,6 +205,8 @@ bool StyleRareNonInheritedData::operator==(const StyleRareNonInheritedData& o) c
         && m_visitedLinkBorderTopColor == o.m_visitedLinkBorderTopColor
         && m_visitedLinkBorderBottomColor == o.m_visitedLinkBorderBottomColor
         && m_order == o.m_order
+        && m_callbackSelectors == o.m_callbackSelectors
+        && m_selectorWatch.get() == o.m_selectorWatch.get()
         && m_flowThread == o.m_flowThread
         && m_regionThread == o.m_regionThread
         && m_regionFragment == o.m_regionFragment