Add SkSourceGammaTreatment enum so we know how to create mips

src/effects/SkPerlinNoiseShader.cpp

Index: src/effects/SkPerlinNoiseShader.cpp
diff --git a/src/effects/SkPerlinNoiseShader.cpp b/src/effects/SkPerlinNoiseShader.cpp
index 63916d3ca74112045529ea2f71463af46038f567..020a47c6eb48b31753e8b37dd68ab0c055c116bb 100644
--- a/src/effects/SkPerlinNoiseShader.cpp
+++ b/src/effects/SkPerlinNoiseShader.cpp
@@ -593,7 +593,7 @@ const GrFragmentProcessor* GrPerlinNoiseEffect::TestCreate(GrProcessorTestData*
 
     return shader->asFragmentProcessor(d->fContext,
                                        GrTest::TestMatrix(d->fRandom), nullptr,
-                                       kNone_SkFilterQuality);
+                                       kNone_SkFilterQuality, false);
 }
 
 void GrGLPerlinNoise::emitCode(EmitArgs& args) {
@@ -896,7 +896,8 @@ const GrFragmentProcessor* SkPerlinNoiseShader::asFragmentProcessor(
                                                     GrContext* context,
                                                     const SkMatrix& viewM,
                                                     const SkMatrix* externalLocalMatrix,
-                                                    SkFilterQuality) const {
+                                                    SkFilterQuality,
+                                                    bool gammaCorrect) const {
     SkASSERT(context);
 
     SkMatrix localMatrix = this->getLocalMatrix();
@@ -926,10 +927,10 @@ const GrFragmentProcessor* SkPerlinNoiseShader::asFragmentProcessor(
             new PaintingData(fTileSize, fSeed, fBaseFrequencyX, fBaseFrequencyY, matrix);
     SkAutoTUnref<GrTexture> permutationsTexture(
         GrRefCachedBitmapTexture(context, paintingData->getPermutationsBitmap(),
-                                 GrTextureParams::ClampNoFilter()));
+                                 GrTextureParams::ClampNoFilter(), gammaCorrect));
     SkAutoTUnref<GrTexture> noiseTexture(
         GrRefCachedBitmapTexture(context, paintingData->getNoiseBitmap(),
-                                 GrTextureParams::ClampNoFilter()));
+                                 GrTextureParams::ClampNoFilter(), gammaCorrect));
 
     SkMatrix m = viewM;
     m.setTranslateX(-localMatrix.getTranslateX() + SK_Scalar1);