Initial conic-gradient() implementation

third_party/WebKit/Source/platform/graphics/Gradient.h

Index: third_party/WebKit/Source/platform/graphics/Gradient.h
diff --git a/third_party/WebKit/Source/platform/graphics/Gradient.h b/third_party/WebKit/Source/platform/graphics/Gradient.h
index cd8d5cba9f33ab8c12fb3e420aeb65fcf7553780..008bbf94683025a89f2cfd4670882a922be3d283 100644
--- a/third_party/WebKit/Source/platform/graphics/Gradient.h
+++ b/third_party/WebKit/Source/platform/graphics/Gradient.h
@@ -51,7 +51,7 @@ class PLATFORM_EXPORT Gradient : public RefCounted<Gradient> {
   WTF_MAKE_NONCOPYABLE(Gradient);
 
  public:
-  enum class Type { Linear, Radial };
+  enum class Type { Linear, Radial, Conic };
 
   enum class ColorInterpolation {
     Premultiplied,
@@ -73,6 +73,12 @@ class PLATFORM_EXPORT Gradient : public RefCounted<Gradient> {
       GradientSpreadMethod = SpreadMethodPad,
       ColorInterpolation = ColorInterpolation::Unpremultiplied);
 
+  static PassRefPtr<Gradient> createConic(
+      const FloatPoint& position,
+      float angle,
+      GradientSpreadMethod = SpreadMethodPad,
+      ColorInterpolation = ColorInterpolation::Unpremultiplied);
+
   virtual ~Gradient() = default;
 
   Type getType() const { return m_type; }