sRGB cleanup in image filters. Ensure we configure paints correctly.

src/effects/SkDisplacementMapEffect.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkDisplacementMapEffect.h"
 
 #include "SkBitmap.h"
@@ skipping 326 matching lines @@
         matrix.setTranslate(-SkIntToScalar(colorBounds.x()), -SkIntToScalar(colorBounds.y()));
 
         SkColorSpace* colorSpace = ctx.outputProperties().colorSpace();
         sk_sp<GrDrawContext> drawContext(
             context->makeDrawContext(SkBackingFit::kApprox, bounds.width(), bounds.height(),
                                      GrRenderableConfigForColorSpace(colorSpace),
                                      sk_ref_sp(colorSpace)));
         if (!drawContext) {
             return nullptr;
         }
+        paint.setGammaCorrect(drawContext->isGammaCorrect());
 
         drawContext->drawRect(GrNoClip(), paint, matrix, SkRect::Make(colorBounds));
 
         offset->fX = bounds.left();
         offset->fY = bounds.top();
         return SkSpecialImage::MakeFromGpu(SkIRect::MakeWH(bounds.width(), bounds.height()),
                                            kNeedNewImageUniqueID_SpecialImage,
                                            drawContext->asTexture(),
                                            sk_ref_sp(drawContext->getColorSpace()));
     }
@@ skipping 264 matching lines @@
 void GrGLDisplacementMapEffect::GenKey(const GrProcessor& proc,
                                        const GrGLSLCaps&, GrProcessorKeyBuilder* b) {
     const GrDisplacementMapEffect& displacementMap = proc.cast<GrDisplacementMapEffect>();
 
     uint32_t xKey = displacementMap.xChannelSelector();
     uint32_t yKey = displacementMap.yChannelSelector() << kChannelSelectorKeyBits;
 
     b->add32(xKey | yKey);
 }
 #endif