[SVG2] Add support for the 'turn' unit in <angle>.

Source/core/svg/SVGAngle.h

 /*
  * Copyright (C) 2004, 2005, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006 Rob Buis <buis@kde.org>
  * Copyright (C) Research In Motion Limited 2010. 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 49 matching lines @@
 
 class SVGAngle : public SVGPropertyBase {
 public:
     typedef SVGAngleTearOff TearOffType;
 
     enum SVGAngleType {
         SVG_ANGLETYPE_UNKNOWN = 0,
         SVG_ANGLETYPE_UNSPECIFIED = 1,
         SVG_ANGLETYPE_DEG = 2,
         SVG_ANGLETYPE_RAD = 3,
-        SVG_ANGLETYPE_GRAD = 4
+        SVG_ANGLETYPE_GRAD = 4,
+        SVG_ANGLETYPE_TURN = 5

[fs, 2014/06/02 12:49:39]

Should this be exposed on the DOM SVGAngle interface? Not in the spec. ATM
(AFAICS), but I suspect you'll still get unitType === 5 if you access
SVGMarkerElement.orientAngle for instance?

Some rudimentary tests for that (and the conversions) would probably be good (in
either case.)

[Erik Dahlström (inactive), 2014/06/03 15:30:29]

Will raise this in the WG, but I think we should still go ahead with it.
Added.

     };
 
     static PassRefPtr<SVGAngle> create()
     {
         return adoptRef(new SVGAngle());
     }
 
     virtual ~SVGAngle();
 
     SVGAngleType unitType() const { return m_unitType; }
@@ skipping 36 matching lines @@
 inline PassRefPtr<SVGAngle> toSVGAngle(PassRefPtr<SVGPropertyBase> passBase)
 {
     RefPtr<SVGPropertyBase> base = passBase;
     ASSERT(base->type() == SVGAngle::classType());
     return static_pointer_cast<SVGAngle>(base.release());
 }
 
 } // namespace WebCore
 
 #endif // SVGAngle_h