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

src/core/SkImageFilter.cpp

Index: src/core/SkImageFilter.cpp
diff --git a/src/core/SkImageFilter.cpp b/src/core/SkImageFilter.cpp
index 9ec6f2c28f6e1272dcb43ca24903079a3183923b..be48ca17ba101b231b7708af7ef7804bcef583f5 100644
--- a/src/core/SkImageFilter.cpp
+++ b/src/core/SkImageFilter.cpp
@@ -292,6 +292,7 @@ sk_sp<SkSpecialImage> SkImageFilter::DrawWithFP(GrContext* context,
     if (!drawContext) {
         return nullptr;
     }
+    paint.setGammaCorrect(drawContext->isGammaCorrect());
 
     SkIRect dstIRect = SkIRect::MakeWH(bounds.width(), bounds.height());
     SkRect srcRect = SkRect::Make(bounds);