tunnel down texture-size-constraint to imagefilters

src/effects/SkBlurImageFilter.cpp

Index: src/effects/SkBlurImageFilter.cpp
diff --git a/src/effects/SkBlurImageFilter.cpp b/src/effects/SkBlurImageFilter.cpp
index 8398f48b7f815e3af535b299727137c01c7943b5..c77a444da5c7a31ddc85fa56da04d30fb2d62687 100644
--- a/src/effects/SkBlurImageFilter.cpp
+++ b/src/effects/SkBlurImageFilter.cpp
@@ -212,13 +212,15 @@ bool SkBlurImageFilter::filterImageGPU(Proxy* proxy, const SkBitmap& src, const
     offset->fX = rect.fLeft;
     offset->fY = rect.fTop;
     rect.offset(-srcOffset);
+    auto constraint = GrTextureProvider::FromImageFilter(ctx.sizeConstraint());
     SkAutoTUnref<GrTexture> tex(SkGpuBlurUtils::GaussianBlur(source->getContext(),
                                                              source,
                                                              false,
                                                              SkRect::Make(rect),
                                                              true,
                                                              sigma.x(),
-                                                             sigma.y()));
+                                                             sigma.y(),
+                                                             constraint));
     if (!tex) {
         return false;
     }