remove DownSample imagefilter

src/ports/SkGlobalInitialization_default.cpp

Index: src/ports/SkGlobalInitialization_default.cpp
diff --git a/src/ports/SkGlobalInitialization_default.cpp b/src/ports/SkGlobalInitialization_default.cpp
index 37904a0d4b4cfc2729c9962605d3fa428cb0cea3..933973eb93a5668f018f76a61de4981610dc26a8 100644
--- a/src/ports/SkGlobalInitialization_default.cpp
+++ b/src/ports/SkGlobalInitialization_default.cpp
@@ -41,7 +41,6 @@
 #include "SkPerlinNoiseShader.h"
 #include "SkPictureImageFilter.h"
 #include "SkTableColorFilter.h"
-#include "SkTestImageFilters.h"
 #include "SkTileImageFilter.h"
 #include "SkXfermodeImageFilter.h"
 
@@ -119,6 +118,5 @@ void SkFlattenable::PrivateInitializer::InitEffects() {
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkComposeImageFilter)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkMergeImageFilter)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkColorFilterImageFilter)
-    SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkDownSampleImageFilter)
     SkLightingImageFilter::InitializeFlattenables();
 }