Add SVG Text to support the CSS 'text-orientation' property

third_party/WebKit/Source/platform/fonts/FontOrientation.h

 /*
  * Copyright (C) 2010 Apple 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:
  * 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 37 matching lines @@
 inline bool operator&(FontOrientation value, FontOrientation mask) { return static_cast<unsigned>(value) & static_cast<unsigned>(mask); }
 inline bool isVerticalAnyUpright(FontOrientation orientation) { return orientation & FontOrientation::AnyUprightMask; }
 inline bool isVerticalNonCJKUpright(FontOrientation orientation) { return orientation == FontOrientation::VerticalUpright; }
 inline bool isVerticalUpright(FontOrientation orientation, UChar32 character)
 {
     return orientation == FontOrientation::VerticalUpright
         || (orientation == FontOrientation::VerticalMixed && Character::isUprightInMixedVertical(character));
 }
 inline bool isVerticalBaseline(FontOrientation orientation) { return orientation != FontOrientation::Horizontal; }
 
+inline FontOrientation adjustOrientationForCharacterInMixedVertical(FontOrientation orientation, UChar32 character)
+{
+    if (orientation != FontOrientation::VerticalMixed)
+        return orientation;
+    return Character::isUprightInMixedVertical(character)
+        ? FontOrientation::VerticalUpright
+        : FontOrientation::VerticalRotated;
+}
+
 } // namespace blink
 
 #endif // FontOrientation_h