Remove SkGrPixelRef

src/image/SkImage_Gpu.cpp

Index: src/image/SkImage_Gpu.cpp
diff --git a/src/image/SkImage_Gpu.cpp b/src/image/SkImage_Gpu.cpp
index b3604b999b3594dd57bed389ebece1e65227339c..9e10dab4a7d902e74a266a675264c6bd3a4ca86d 100644
--- a/src/image/SkImage_Gpu.cpp
+++ b/src/image/SkImage_Gpu.cpp
@@ -13,7 +13,6 @@
 #include "effects/GrYUVEffect.h"
 #include "SkCanvas.h"
 #include "SkBitmapCache.h"
-#include "SkGrPixelRef.h"
 #include "SkGrPriv.h"
 #include "SkImage_Gpu.h"
 #include "SkMipMap.h"
@@ -74,13 +73,6 @@ bool SkImage_Gpu::getROPixels(SkBitmap* dst, CachingHint chint) const {
     return true;
 }
 
-bool SkImage_Gpu::asBitmapForImageFilters(SkBitmap* bitmap) const {
-    bitmap->setInfo(make_info(this->width(), this->height(), this->isOpaque(), fColorSpace));
-    bitmap->setPixelRef(new SkGrPixelRef(bitmap->info(), fTexture))->unref();
-    bitmap->pixelRef()->setImmutableWithID(this->uniqueID());
-    return true;
-}
-
 GrTexture* SkImage_Gpu::asTextureRef(GrContext* ctx, const GrTextureParams& params,
                                      SkSourceGammaTreatment gammaTreatment) const {
     return GrImageTextureAdjuster(as_IB(this)).refTextureSafeForParams(params, gammaTreatment,