Expose a cachePolicy parameter to loadHistoryItem.

Source/web/WebFrameImpl.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 127 matching lines @@
         const WebString& name,
         const WebString& path);
     virtual v8::Handle<v8::Value> createFileEntry(WebFileSystemType,
         const WebString& fileSystemName,
         const WebString& fileSystemPath,
         const WebString& filePath,
         bool isDirectory);
     virtual void reload(bool ignoreCache);
     virtual void reloadWithOverrideURL(const WebURL& overrideUrl, bool ignoreCache);
     virtual void loadRequest(const WebURLRequest&);
-    virtual void loadHistoryItem(const WebHistoryItem&);
+    virtual void loadHistoryItem(const WebHistoryItem&, WebURLRequest::CachePolicy);
     virtual void loadData(
         const WebData&, const WebString& mimeType, const WebString& textEncoding,
         const WebURL& baseURL, const WebURL& unreachableURL, bool replace);
     virtual void loadHTMLString(
         const WebData& html, const WebURL& baseURL, const WebURL& unreachableURL,
         bool replace);
     virtual bool isLoading() const;
     virtual void stopLoading();
     virtual WebDataSource* provisionalDataSource() const;
     virtual WebDataSource* dataSource() const;
@@ skipping 365 matching lines @@
     // Stores the additional input events offset and scale when device metrics emulation is enabled.
     WebCore::IntSize m_inputEventsOffsetForEmulation;
     float m_inputEventsScaleFactorForEmulation;
 };
 
 DEFINE_TYPE_CASTS(WebFrameImpl, WebFrame, frame, true, true);
 
 } // namespace blink
 
 #endif