Add SkSourceGammaTreatment enum so we know how to create mips

src/gpu/SkGpuDevice_drawTexture.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkGpuDevice.h"
 
 #include "GrBlurUtils.h"
@@ skipping 183 matching lines @@
     const SkMatrix* textureMatrix;
     SkMatrix tempMatrix;
     if (canUseTextureCoordsAsLocalCoords) {
         textureMatrix = &SkMatrix::I();
     } else {
         if (!srcToDstMatrix.invert(&tempMatrix)) {
             return;
         }
         textureMatrix = &tempMatrix;
     }
+    bool gammaCorrect = this->surfaceProps().isGammaCorrect();
+    SkSourceGammaTreatment gammaTreatment = gammaCorrect
+        ? SkSourceGammaTreatment::kRespect : SkSourceGammaTreatment::kIgnore;
     SkAutoTUnref<const GrFragmentProcessor> fp(producer->createFragmentProcessor(
-        *textureMatrix, clippedSrcRect, constraintMode, coordsAllInsideSrcRect, filterMode));
+        *textureMatrix, clippedSrcRect, constraintMode, coordsAllInsideSrcRect, filterMode,
+        gammaTreatment));
     if (!fp) {
         return;
     }
 
     GrPaint grPaint;
     if (!SkPaintToGrPaintWithTexture(fContext, paint, viewMatrix, fp, producer->isAlphaOnly(),
-                                     this->surfaceProps().isGammaCorrect(), &grPaint)) {
+                                     gammaCorrect, &grPaint)) {
         return;
     }
 
     if (canUseTextureCoordsAsLocalCoords) {
         fDrawContext->fillRectToRect(clip, grPaint, viewMatrix, clippedDstRect, clippedSrcRect);
         return;
     }
 
     if (!mf) {
         fDrawContext->drawRect(clip, grPaint, viewMatrix, clippedDstRect);
@@ skipping 13 matching lines @@
                                       rrect)) {
         return;
     }
     SkPath rectPath;
     rectPath.addRect(clippedDstRect);
     rectPath.setIsVolatile(true);
     GrBlurUtils::drawPathWithMaskFilter(this->context(), fDrawContext.get(), fClip,
                                         rectPath, &grPaint, viewMatrix, mf, GrStyle::SimpleFill(),
                                         true);
 }