[SVGDom] Linear gradient 'gradientTransform' support

experimental/svg/model/SkSVGAttribute.h

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkSVGAttribute_DEFINED
 #define SkSVGAttribute_DEFINED
 
 #include "SkSVGTypes.h"
 #include "SkTLazy.h"
 
 class SkSVGRenderContext;
 
 enum class SkSVGAttribute {
     kCx, // <circle>,<ellipse>: center x position
     kCy, // <circle>,<ellipse>: center y position
     kD,
     kFill,
     kFillOpacity,
+    kGradientTransform,
     kHeight,
     kHref,
     kOffset,
     kOpacity,
     kPoints,
     kR,  // <circle>: radius
     kRx, // <ellipse>,<rect>: horizontal (corner) radius
     kRy, // <ellipse>,<rect>: vertical (corner) radius
     kSpreadMethod,
     kStopColor,
@@ skipping 27 matching lines @@
     SkTLazy<SkSVGPaint>      fStroke;
     SkTLazy<SkSVGLineCap>    fStrokeLineCap;
     SkTLazy<SkSVGLineJoin>   fStrokeLineJoin;
     SkTLazy<SkSVGNumberType> fStrokeOpacity;
     SkTLazy<SkSVGLength>     fStrokeWidth;
 
     SkTLazy<SkSVGNumberType> fOpacity;
 };
 
 #endif // SkSVGAttribute_DEFINED