Added pinch viewport offset to history item.

public/web/WebHistoryItem.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 23 matching lines @@
 #include "../platform/WebCommon.h"
 #include "../platform/WebPrivatePtr.h"
 #include "../platform/WebReferrerPolicy.h"
 
 namespace WebCore { class HistoryItem; }
 
 namespace blink {
 class WebHTTPBody;
 class WebString;
 class WebSerializedScriptValue;
+struct WebFloatPoint;
 struct WebPoint;
 template <typename T> class WebVector;
 
 enum WebHistoryLoadType {
     WebHistorySameDocumentLoad,
     WebHistoryDifferentDocumentLoad
 };
 
 // Represents a frame-level navigation entry in session history.  A
 // WebHistoryItem is a node in a tree.
@@ skipping 21 matching lines @@
     BLINK_EXPORT WebString urlString() const;
     BLINK_EXPORT void setURLString(const WebString&);
 
     BLINK_EXPORT WebString referrer() const;
     BLINK_EXPORT WebReferrerPolicy referrerPolicy() const;
     BLINK_EXPORT void setReferrer(const WebString&, WebReferrerPolicy);
 
     BLINK_EXPORT WebString target() const;
     BLINK_EXPORT void setTarget(const WebString&);
 
+    BLINK_EXPORT WebFloatPoint pinchViewportScrollOffset() const;
+    BLINK_EXPORT void setPinchViewportScrollOffset(const WebFloatPoint&);
+
     BLINK_EXPORT WebPoint scrollOffset() const;
     BLINK_EXPORT void setScrollOffset(const WebPoint&);
 
     BLINK_EXPORT float pageScaleFactor() const;
     BLINK_EXPORT void setPageScaleFactor(float);
 
     BLINK_EXPORT WebVector<WebString> documentState() const;
     BLINK_EXPORT void setDocumentState(const WebVector<WebString>&);
 
     BLINK_EXPORT long long itemSequenceNumber() const;
@@ skipping 19 matching lines @@
     operator WTF::PassRefPtr<WebCore::HistoryItem>() const;
 #endif
 
 private:
     WebPrivatePtr<WebCore::HistoryItem> m_private;
 };
 
 } // namespace blink
 
 #endif