tunnel down texture-size-constraint to imagefilters

src/gpu/GrLayerHoister.cpp

Index: src/gpu/GrLayerHoister.cpp
diff --git a/src/gpu/GrLayerHoister.cpp b/src/gpu/GrLayerHoister.cpp
index 5bddc036dfa5927f4f08d1a7583a20e049504f30..2bf1abb5fdb3618debdac00385c1d72cd1d35783 100644
--- a/src/gpu/GrLayerHoister.cpp
+++ b/src/gpu/GrLayerHoister.cpp
@@ -311,7 +311,7 @@ void GrLayerHoister::FilterLayer(GrContext* context,
     // This cache is transient, and is freed (along with all its contained
     // textures) when it goes out of scope.
     SkAutoTUnref<SkImageFilter::Cache> cache(SkImageFilter::Cache::Create(kDefaultCacheSize));
-    SkImageFilter::Context filterContext(totMat, clipBounds, cache);
+    SkImageFilter::Context filterContext(totMat, clipBounds, cache, SkImageFilter::kApprox_SizeConstraint);
 
     SkImageFilter::DeviceProxy proxy(device);
     const SkBitmap src = wrap_texture(layer->texture());