Split the frame tree logic out of HistoryItem

Source/core/history/HistoryItem.h

Index: Source/core/history/HistoryItem.h
diff --git a/Source/core/history/HistoryItem.h b/Source/core/history/HistoryItem.h
index 15793db5257715c5c1aefb330499eba38d72e469..4fc9326dd416210113fe5ced925a48cccf828296 100644
--- a/Source/core/history/HistoryItem.h
+++ b/Source/core/history/HistoryItem.h
@@ -91,33 +91,23 @@ public:
     void setDocumentSequenceNumber(long long number) { m_documentSequenceNumber = number; }
     long long documentSequenceNumber() const { return m_documentSequenceNumber; }
 
+    void setTargetFrameID(int64_t number) { m_targetFrameID = number; }

[abarth-chromium, 2013/10/29 20:36:58]

s/number/id/ ?

+    int64_t targetFrameID() const { return m_targetFrameID; }
+
     void setFormInfoFromRequest(const ResourceRequest&);
     void setFormData(PassRefPtr<FormData>);
     void setFormContentType(const String&);
 
     void addChildItem(PassRefPtr<HistoryItem>);
-    void setChildItem(PassRefPtr<HistoryItem>);
-    HistoryItem* childItemWithTarget(const String&) const;
-    HistoryItem* childItemWithDocumentSequenceNumber(long long number) const;
     const HistoryItemVector& children() const;
     void clearChildren();
 
-    bool shouldDoSameDocumentNavigationTo(HistoryItem* otherItem) const;
-    bool hasSameFrames(HistoryItem* otherItem) const;
-
     bool isCurrentDocument(Document*) const;
 
-#ifndef NDEBUG
-    int showTree() const;
-    int showTreeWithIndent(unsigned indentLevel) const;
-#endif
-
 private:
     HistoryItem();
     explicit HistoryItem(const HistoryItem&);
 
-    bool hasSameDocumentTree(HistoryItem* otherItem) const;
-
     String m_urlString;
     String m_originalURLString;
     String m_referrer;
@@ -140,6 +130,8 @@ private:
     // such HistoryItem to another preserves the document.
     int64_t m_documentSequenceNumber;
 
+    int64_t m_targetFrameID;
+
     // Support for HTML5 History
     RefPtr<SerializedScriptValue> m_stateObject;
 
@@ -151,9 +143,4 @@ private:
 
 } //namespace WebCore
 
-#ifndef NDEBUG
-// Outside the WebCore namespace for ease of invocation from gdb.
-extern "C" int showTree(const WebCore::HistoryItem*);
-#endif
-
 #endif // HISTORYITEM_H