Add navigation controls to DevTools screencast view

Source/core/inspector/InspectorPageAgent.h

 /*
  * Copyright (C) 2011 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 75 matching lines @@
     static ResourceType cachedResourceType(const Resource&);
     static TypeBuilder::Page::ResourceType::Enum cachedResourceTypeJson(const Resource&);
 
     // Page API for InspectorFrontend
     virtual void enable(ErrorString*);
     virtual void disable(ErrorString*);
     virtual void addScriptToEvaluateOnLoad(ErrorString*, const String& source, String* result);
     virtual void removeScriptToEvaluateOnLoad(ErrorString*, const String& identifier);
     virtual void reload(ErrorString*, const bool* optionalIgnoreCache, const String* optionalScriptToEvaluateOnLoad, const String* optionalScriptPreprocessor);
     virtual void navigate(ErrorString*, const String& url);
+    virtual void getNavigationHistory(ErrorString*, int*, RefPtr<TypeBuilder::Array<TypeBuilder::Page::NavigationEntry> >&);
+    virtual void navigateToHistoryEntry(ErrorString*, int);
     virtual void getCookies(ErrorString*, RefPtr<TypeBuilder::Array<TypeBuilder::Page::Cookie> >& cookies, WTF::String* cookiesString);
     virtual void deleteCookie(ErrorString*, const String& cookieName, const String& url);
     virtual void getResourceTree(ErrorString*, RefPtr<TypeBuilder::Page::FrameResourceTree>&);
     virtual void getResourceContent(ErrorString*, const String& frameId, const String& url, String* content, bool* base64Encoded);
     virtual void searchInResource(ErrorString*, const String& frameId, const String& url, const String& query, const bool* optionalCaseSensitive, const bool* optionalIsRegex, RefPtr<TypeBuilder::Array<TypeBuilder::Page::SearchMatch> >&);
     virtual void searchInResources(ErrorString*, const String&, const bool* caseSensitive, const bool* isRegex, RefPtr<TypeBuilder::Array<TypeBuilder::Page::SearchResult> >&);
     virtual void setDocumentContent(ErrorString*, const String& frameId, const String& html);
     virtual void setDeviceMetricsOverride(ErrorString*, int width, int height, double fontScaleFactor, bool fitWindow);
     virtual void setShowPaintRects(ErrorString*, bool show);
     virtual void setShowDebugBorders(ErrorString*, bool show);
@@ skipping 101 matching lines @@
     RefPtr<GeolocationPosition> m_geolocationPosition;
     RefPtr<GeolocationPosition> m_platformGeolocationPosition;
     RefPtr<DeviceOrientationData> m_deviceOrientation;
 };
 
 
 } // namespace WebCore
 
 
 #endif // !defined(InspectorPagerAgent_h)