Add SkSourceGammaTreatment enum so we know how to create mips

include/core/SkShader.h

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkShader_DEFINED
 #define SkShader_DEFINED
 
@@ skipping 309 matching lines @@
      *
      *  The GrContext may be used by the to create textures that are required by the returned
      *  processor.
      *
      *  The returned GrFragmentProcessor should expect an unpremultiplied input color and
      *  produce a premultiplied output.
      */
     virtual const GrFragmentProcessor* asFragmentProcessor(GrContext*,
                                                            const SkMatrix& viewMatrix,
                                                            const SkMatrix* localMatrix,
-                                                           SkFilterQuality) const;
+                                                           SkFilterQuality,
+                                                           SkSourceGammaTreatment) const;
 
     /**
      *  If the shader can represent its "average" luminance in a single color, return true and
      *  if color is not NULL, return that color. If it cannot, return false and ignore the color
      *  parameter.
      *
      *  Note: if this returns true, the returned color will always be opaque, as only the RGB
      *  components are used to compute luminance.
      */
     bool asLuminanceColor(SkColor*) const;
@@ skipping 157 matching lines @@
     SkMatrix fLocalMatrix;
 
     // So the SkLocalMatrixShader can whack fLocalMatrix in its SkReadBuffer constructor.
     friend class SkLocalMatrixShader;
     friend class SkBitmapProcShader;    // for computeTotalInverse()
 
     typedef SkFlattenable INHERITED;
 };
 
 #endif