Revert of Add SkSpecialImage::makeTextureImage entry point & update filterInput

src/core/SkSpecialImage.cpp

Index: src/core/SkSpecialImage.cpp
diff --git a/src/core/SkSpecialImage.cpp b/src/core/SkSpecialImage.cpp
index 991e16351586674ad01272215071f043c72d8408..e90c655a5824567bb64035da8643567ea77f73e1 100644
--- a/src/core/SkSpecialImage.cpp
+++ b/src/core/SkSpecialImage.cpp
@@ -4,16 +4,10 @@
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file
  */
-#include "SkSpecialImage.h"
-
-#if SK_SUPPORT_GPU
-#include "GrTexture.h"
-#include "GrTextureParams.h"
-#include "SkGr.h"
-#endif
 
 #include "SkCanvas.h"
 #include "SkImage_Base.h"
+#include "SkSpecialImage.h"
 #include "SkSpecialSurface.h"
 
 ///////////////////////////////////////////////////////////////////////////////
@@ -46,38 +40,6 @@
 ///////////////////////////////////////////////////////////////////////////////
 static inline const SkSpecialImage_Base* as_SIB(const SkSpecialImage* image) {
     return static_cast<const SkSpecialImage_Base*>(image);
-}
-
-sk_sp<SkSpecialImage> SkSpecialImage::makeTextureImage(SkImageFilter::Proxy* proxy,
-                                                       GrContext* context) {
-#if SK_SUPPORT_GPU
-    if (!context) {
-        return nullptr;
-    }
-    if (GrTexture* peek = as_SIB(this)->peekTexture()) {
-        return peek->getContext() == context ? sk_sp<SkSpecialImage>(SkRef(this)) : nullptr;
-    }
-
-    SkBitmap bmp;
-    if (!this->internal_getBM(&bmp)) {
-        return nullptr;
-    }
-
-    SkAutoTUnref<GrTexture> resultTex(
-        GrRefCachedBitmapTexture(context, bmp, GrTextureParams::ClampNoFilter()));
-    if (!resultTex) {
-        return nullptr;
-    }
-
-    SkAlphaType at = this->isOpaque() ? kOpaque_SkAlphaType : kPremul_SkAlphaType;
-
-    return SkSpecialImage::MakeFromGpu(proxy,
-                                       SkIRect::MakeWH(resultTex->width(), resultTex->height()),
-                                       this->uniqueID(),
-                                       resultTex, at);
-#else
-    return nullptr;
-#endif
 }
 
 void SkSpecialImage::draw(SkCanvas* canvas, SkScalar x, SkScalar y, const SkPaint* paint) const {