Add SkSourceGammaTreatment enum so we know how to create mips

gm/texturedomaineffect.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 // This test only works with the GPU backend.
 
 #include "gm.h"
@@ skipping 64 matching lines @@
             skiagm::GM::DrawGpuOnlyMessage(canvas);
             return;
         }
 
         GrContext* context = canvas->getGrContext();
         if (!context) {
             return;
         }
 
         SkAutoTUnref<GrTexture> texture(GrRefCachedBitmapTexture(context, fBmp,
-                                                                 GrTextureParams::ClampNoFilter()));
+                                                                 GrTextureParams::ClampNoFilter(),
+                                                                 SkSourceGammaTreatment::kRespect));
         if (!texture) {
             return;
         }
 
         SkTArray<SkMatrix> textureMatrices;
         textureMatrices.push_back().setIDiv(texture->width(), texture->height());
         textureMatrices.push_back() = textureMatrices[0];
         textureMatrices.back().postScale(1.5f, 0.85f);
         textureMatrices.push_back() = textureMatrices[0];
         textureMatrices.back().preRotate(45.f, texture->width() / 2.f, texture->height() / 2.f);
@@ skipping 53 matching lines @@
 };
 
 // Windows builds did not like SkScalar initialization in class :(
 const SkScalar TextureDomainEffect::kDrawPad = 10.f;
 const SkScalar TextureDomainEffect::kTestPad = 10.f;
 
 DEF_GM(return new TextureDomainEffect;)
 }
 
 #endif