Add text autosizing override in the inspector.

Source/core/page/Settings.h

 /*
  * Copyright (C) 2003, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All rights reserved.
  *           (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *
  * 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 68 matching lines @@
     void setCursiveFontFamily(const AtomicString&, UScriptCode = USCRIPT_COMMON);
     const AtomicString& cursiveFontFamily(UScriptCode = USCRIPT_COMMON) const;
 
     void setFantasyFontFamily(const AtomicString&, UScriptCode = USCRIPT_COMMON);
     const AtomicString& fantasyFontFamily(UScriptCode = USCRIPT_COMMON) const;
 
     void setPictographFontFamily(const AtomicString&, UScriptCode = USCRIPT_COMMON);
     const AtomicString& pictographFontFamily(UScriptCode = USCRIPT_COMMON) const;
 
     void setTextAutosizingEnabled(bool);
-    bool textAutosizingEnabled() const { return m_textAutosizingEnabled; }
+    bool textAutosizingEnabled() const;
 
     void setTextAutosizingFontScaleFactor(float);
     float textAutosizingFontScaleFactor() const { return m_textAutosizingFontScaleFactor; }
 
     // Only set by Layout Tests, and only used if textAutosizingEnabled() returns true.
     void setTextAutosizingWindowSizeOverride(const IntSize&);
     const IntSize& textAutosizingWindowSizeOverride() const { return m_textAutosizingWindowSizeOverride; }
 
     void setUseWideViewport(bool);
     bool useWideViewport() const { return m_useWideViewport; }
@@ skipping 90 matching lines @@
     // overflow scroll is ready (crbug.com/254111).
     bool m_compositorDrivenAcceleratedScrollingEnabled : 1;
 
     Timer<Settings> m_setImageLoadingSettingsTimer;
     void imageLoadingSettingsTimerFired(Timer<Settings>*);
 };
 
 } // namespace WebCore
 
 #endif // Settings_h