Remove the ENABLE_TEXT_AUTOSIZING compile-time flag.

Source/WTF/wtf/FeatureDefines.h

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2007-2009 Torch Mobile, Inc.
  * Copyright (C) 2010, 2011 Research In Motion Limited. All rights reserved.
  * Copyright (C) 2013 Samsung Electronics. 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
@@ skipping 453 matching lines @@
 #define ENABLE_SVG_DOM_OBJC_BINDINGS 0
 #endif
 #endif
 
 #if ENABLE(SVG)
 #if !defined(ENABLE_SVG_FONTS)
 #define ENABLE_SVG_FONTS 1
 #endif
 #endif
 
-#if !defined(ENABLE_TEXT_AUTOSIZING)
-#define ENABLE_TEXT_AUTOSIZING 0
-#endif
-
 #if !defined(ENABLE_TEXT_CARET)
 #define ENABLE_TEXT_CARET 1
 #endif
 
 #if !defined(ENABLE_TEXT_NOTIFICATIONS_ONLY)
 #define ENABLE_TEXT_NOTIFICATIONS_ONLY 0
 #endif
 
 #if !defined(ENABLE_THREADED_HTML_PARSER)
 #define ENABLE_THREADED_HTML_PARSER 0
@@ skipping 71 matching lines @@
 
 #if ENABLE(SVG_FONTS) && !ENABLE(SVG)
 #error "ENABLE(SVG_FONTS) requires ENABLE(SVG)"
 #endif
 
 #if ENABLE(VIDEO_TRACK) && !ENABLE(VIDEO)
 #error "ENABLE(VIDEO_TRACK) requires ENABLE(VIDEO)"
 #endif
 
 #endif /* WTF_FeatureDefines_h */