Clean up the initializer mess in Document.

Source/core/dom/Document.h

Index: Source/core/dom/Document.h
diff --git a/Source/core/dom/Document.h b/Source/core/dom/Document.h
index 6f3c7cfa07f17e4885acd4c934da44ac711eb0ea..0c183b7a0d52a23896ec5b0f2d1221111b5d4a8b 100644
--- a/Source/core/dom/Document.h
+++ b/Source/core/dom/Document.h
@@ -851,8 +851,6 @@ public:
     Document* parentDocument() const;
     Document* topDocument() const;
 
-    int docID() const { return m_docID; }
-    
     ScriptRunner* scriptRunner() { return m_scriptRunner.get(); }
 
     void applyXSLTransform(ProcessingInstruction* pi);
@@ -1190,7 +1188,6 @@ private:
 
     OwnPtr<StyleResolver> m_styleResolver;
     bool m_didCalculateStyleResolver;
-    bool m_hasDirtyStyleResolver;
     bool m_hasNodesWithPlaceholderStyle;
     bool m_needsNotifyRemoveAllPendingStylesheet;
     // But sometimes you need to ignore pending stylesheet count to
@@ -1321,8 +1318,6 @@ private:
     OwnPtr<TransformSource> m_transformSource;
     RefPtr<Document> m_transformSourceDocument;
 
-    int m_docID; // A unique document identifier used for things like document-specific mapped attributes.
-
     String m_xmlEncoding;
     String m_xmlVersion;
     unsigned m_xmlStandalone : 2;