Add SkSourceGammaTreatment enum so we know how to create mips

src/gpu/SkGrPriv.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkGrPriv_DEFINED
 #define SkGrPriv_DEFINED
 
@@ skipping 106 matching lines @@
                                                  const void** outStartOfDataToUpload);
 
 
 /**
  * Creates a new texture for the bitmap. Does not concern itself with cache keys or texture params.
  * The bitmap must have CPU-accessible pixels. Attempts to take advantage of faster paths for
  * compressed textures and yuv planes.
  */
 GrTexture* GrUploadBitmapToTexture(GrContext*, const SkBitmap&);
 
-GrTexture* GrGenerateMipMapsAndUploadToTexture(GrContext*, const SkBitmap&);
+GrTexture* GrGenerateMipMapsAndUploadToTexture(GrContext*, const SkBitmap&, bool gammaCorrect);
 
 /**
  * Creates a new texture for the pixmap.
  */
 GrTexture* GrUploadPixmapToTexture(GrContext*, const SkPixmap&, SkBudgeted budgeted);
 
 /**
  * Creates a new texture populated with the mipmap levels.
  */
 GrTexture* GrUploadMipMapToTexture(GrContext*, const SkImageInfo&, const GrMipLevel* texels,
                                    int mipLevelCount);
 
 //////////////////////////////////////////////////////////////////////////////
 
 GR_STATIC_ASSERT((int)kZero_GrBlendCoeff == (int)SkXfermode::kZero_Coeff);
 GR_STATIC_ASSERT((int)kOne_GrBlendCoeff == (int)SkXfermode::kOne_Coeff);
 GR_STATIC_ASSERT((int)kSC_GrBlendCoeff == (int)SkXfermode::kSC_Coeff);
 GR_STATIC_ASSERT((int)kISC_GrBlendCoeff == (int)SkXfermode::kISC_Coeff);
 GR_STATIC_ASSERT((int)kDC_GrBlendCoeff == (int)SkXfermode::kDC_Coeff);
 GR_STATIC_ASSERT((int)kIDC_GrBlendCoeff == (int)SkXfermode::kIDC_Coeff);
 GR_STATIC_ASSERT((int)kSA_GrBlendCoeff == (int)SkXfermode::kSA_Coeff);
 GR_STATIC_ASSERT((int)kISA_GrBlendCoeff == (int)SkXfermode::kISA_Coeff);
 GR_STATIC_ASSERT((int)kDA_GrBlendCoeff == (int)SkXfermode::kDA_Coeff);
 GR_STATIC_ASSERT((int)kIDA_GrBlendCoeff == (int)SkXfermode::kIDA_Coeff);
 GR_STATIC_ASSERT(SkXfermode::kCoeffCount == 10);
 
 #define SkXfermodeCoeffToGrBlendCoeff(X) ((GrBlendCoeff)(X))
 
 #endif