Add flipped gradient branch to two point conical gradient

src/effects/gradients/SkGradientShaderPriv.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkGradientShaderPriv_DEFINED
 #define SkGradientShaderPriv_DEFINED
 
@@ skipping 187 matching lines @@
     uint8_t     fGradFlags;
 
     struct Rec {
         SkFixed     fPos;   // 0...1
         uint32_t    fScale; // (1 << 24) / range
     };
     Rec*        fRecs;
 
     void commonAsAGradient(GradientInfo*) const;
 
+    // Used for 2-pt conical gradients since we sort start/end cirlces by radius
+    // Assumes space has already been allocated for fOrigColors
+    void flipGradientColors();
+
 private:
     enum {
         kColorStorageCount = 4, // more than this many colors, and we'll use sk_malloc for the space
 
         kStorageSize = kColorStorageCount * (sizeof(SkColor) + sizeof(Rec))
     };
     SkColor     fStorage[(kStorageSize + 3) >> 2];
     SkColor*    fOrigColors; // original colors, before modulation by paint in context.
     bool        fColorsAreOpaque;
 
@@ skipping 205 matching lines @@
     GrGLUniformManager::UniformHandle fColorStartUni;
     GrGLUniformManager::UniformHandle fColorMidUni;
     GrGLUniformManager::UniformHandle fColorEndUni;
 
     typedef GrGLEffect INHERITED;
 };
 
 #endif
 
 #endif