Added pinch viewport offset to history item.

Source/core/loader/HistoryItem.h

 /*
  * Copyright (C) 2006, 2008, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2012 Research In Motion Limited. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 10 matching lines @@
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef HistoryItem_h
 #define HistoryItem_h
 
 #include "bindings/v8/SerializedScriptValue.h"
+#include "platform/geometry/FloatPoint.h"
 #include "platform/geometry/IntPoint.h"
 #include "platform/weborigin/Referrer.h"
 #include "wtf/RefCounted.h"
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
 class Document;
 class DocumentState;
 class FormData;
@@ skipping 16 matching lines @@
 
     const String& urlString() const;
     KURL url() const;
 
     const Referrer& referrer() const;
     const String& target() const;
 
     FormData* formData();
     const AtomicString& formContentType() const;
 
+    const FloatPoint& pinchViewportScrollPoint() const;
+    void setPinchViewportScrollPoint(const FloatPoint&);
     const IntPoint& scrollPoint() const;
     void setScrollPoint(const IntPoint&);
     void clearScrollPoint();
 
     float pageScaleFactor() const;
     void setPageScaleFactor(float);
 
     Vector<String> getReferencedFilePaths();
     const Vector<String>& documentState();
     void setDocumentState(const Vector<String>&);
@@ skipping 27 matching lines @@
 
     bool isCurrentDocument(Document*) const;
 
 private:
     HistoryItem();
 
     String m_urlString;
     Referrer m_referrer;
     String m_target;
 
+    FloatPoint m_pinchViewportScrollPoint;
     IntPoint m_scrollPoint;
     float m_pageScaleFactor;
     Vector<String> m_documentStateVector;
     RefPtr<DocumentState> m_documentState;
 
     HistoryItemVector m_children;
 
     // If two HistoryItems have the same item sequence number, then they are
     // clones of one another. Traversing history from one such HistoryItem to
     // another is a no-op. HistoryItem clones are created for parent and
@@ skipping 10 matching lines @@
 
     // info used to repost form data
     RefPtr<FormData> m_formData;
     AtomicString m_formContentType;
 
 }; // class HistoryItem
 
 } // namespace WebCore
 
 #endif // HISTORYITEM_H