Remove some straggling zoom-related code.

sky/engine/platform/Length.h

 /*
     Copyright (C) 1999 Lars Knoll (knoll@kde.org)
     Copyright (C) 2006, 2008 Apple Inc. All rights reserved.
     Copyright (C) 2011 Rik Cabanier (cabanier@adobe.com)
     Copyright (C) 2011 Adobe Systems Incorporated. All rights reserved.
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Library General Public
     License as published by the Free Software Foundation; either
     version 2 of the License, or (at your option) any later version.
@@ skipping 24 matching lines @@
 
 namespace blink {
 
 // FIXME: This enum makes it hard to tell in general what values may be
 // appropriate for any given Length.
 enum LengthType {
     Auto, Percent, Fixed,
     Intrinsic, MinIntrinsic,
     MinContent, MaxContent, FillAvailable, FitContent,
     Calculated,
-    ExtendToZoom, DeviceWidth, DeviceHeight,
+    DeviceWidth, DeviceHeight,
     MaxSizeNone
 };
 
 enum ValueRange {
     ValueRangeAll,
     ValueRangeNonNegative
 };
 
 struct PixelsAndPercent {
     PixelsAndPercent(float pixels, float percent)
@@ skipping 290 matching lines @@
         float m_floatValue;
     };
     bool m_quirk;
     unsigned char m_type;
     bool m_isFloat;
 };
 
 } // namespace blink
 
 #endif // Length_h