Begin removing deprecated (and now, unused) ImageFilter code paths

src/core/SkSpecialSurface.cpp

Index: src/core/SkSpecialSurface.cpp
diff --git a/src/core/SkSpecialSurface.cpp b/src/core/SkSpecialSurface.cpp
index eecdaecd612b2c81be413d745f646f053f3b21c8..2e2d8cc54a64ea87cb348e2411673eb3688bd91c 100644
--- a/src/core/SkSpecialSurface.cpp
+++ b/src/core/SkSpecialSurface.cpp
@@ -13,9 +13,8 @@
  ///////////////////////////////////////////////////////////////////////////////
 class SkSpecialSurface_Base : public SkSpecialSurface {
 public:
-    SkSpecialSurface_Base(SkImageFilter::Proxy* proxy,
-                          const SkIRect& subset, const SkSurfaceProps* props)
-        : INHERITED(proxy, subset, props)
+    SkSpecialSurface_Base(const SkIRect& subset, const SkSurfaceProps* props)
+        : INHERITED(subset, props)
         , fCanvas(nullptr) {
     }
 
@@ -41,12 +40,10 @@ static SkSpecialSurface_Base* as_SB(SkSpecialSurface* surface) {
     return static_cast<SkSpecialSurface_Base*>(surface);
 }
 
-SkSpecialSurface::SkSpecialSurface(SkImageFilter::Proxy* proxy,
-                                   const SkIRect& subset,
+SkSpecialSurface::SkSpecialSurface(const SkIRect& subset,
                                    const SkSurfaceProps* props)
     : fProps(SkSurfacePropsCopyOrDefault(props).flags(), kUnknown_SkPixelGeometry)
-    , fSubset(subset)
-    , fProxy(proxy) {
+    , fSubset(subset) {
     SkASSERT(fSubset.width() > 0);
     SkASSERT(fSubset.height() > 0);
 }
@@ -66,11 +63,10 @@ sk_sp<SkSpecialImage> SkSpecialSurface::makeImageSnapshot() {
 
 class SkSpecialSurface_Raster : public SkSpecialSurface_Base {
 public:
-    SkSpecialSurface_Raster(SkImageFilter::Proxy* proxy,
-                            SkPixelRef* pr,
+    SkSpecialSurface_Raster(SkPixelRef* pr,
                             const SkIRect& subset,
                             const SkSurfaceProps* props)
-        : INHERITED(proxy, subset, props) {
+        : INHERITED(subset, props) {
         const SkImageInfo& info = pr->info();
 
         fBitmap.setInfo(info, info.minRowBytes());
@@ -83,8 +79,7 @@ public:
     ~SkSpecialSurface_Raster() override { }
 
     sk_sp<SkSpecialImage> onMakeImageSnapshot() override {
-        return SkSpecialImage::MakeFromRaster(this->proxy(), this->subset(), fBitmap,
-                                              &this->props());
+        return SkSpecialImage::MakeFromRaster(this->subset(), fBitmap, &this->props());
     }
 
 private:
@@ -93,14 +88,12 @@ private:
     typedef SkSpecialSurface_Base INHERITED;
 };
 
-sk_sp<SkSpecialSurface> SkSpecialSurface::MakeFromBitmap(SkImageFilter::Proxy* proxy,
-                                                         const SkIRect& subset, SkBitmap& bm,
+sk_sp<SkSpecialSurface> SkSpecialSurface::MakeFromBitmap(const SkIRect& subset, SkBitmap& bm,
                                                          const SkSurfaceProps* props) {
-    return sk_make_sp<SkSpecialSurface_Raster>(proxy, bm.pixelRef(), subset, props);
+    return sk_make_sp<SkSpecialSurface_Raster>(bm.pixelRef(), subset, props);
 }
 
-sk_sp<SkSpecialSurface> SkSpecialSurface::MakeRaster(SkImageFilter::Proxy* proxy,
-                                                     const SkImageInfo& info,
+sk_sp<SkSpecialSurface> SkSpecialSurface::MakeRaster(const SkImageInfo& info,
                                                      const SkSurfaceProps* props) {
     SkAutoTUnref<SkPixelRef> pr(SkMallocPixelRef::NewZeroed(info, 0, nullptr));
     if (nullptr == pr.get()) {
@@ -109,7 +102,7 @@ sk_sp<SkSpecialSurface> SkSpecialSurface::MakeRaster(SkImageFilter::Proxy* proxy
 
     const SkIRect subset = SkIRect::MakeWH(pr->info().width(), pr->info().height());
 
-    return sk_make_sp<SkSpecialSurface_Raster>(proxy, pr, subset, props);
+    return sk_make_sp<SkSpecialSurface_Raster>(pr, subset, props);
 }
 
 #if SK_SUPPORT_GPU
@@ -119,11 +112,10 @@ sk_sp<SkSpecialSurface> SkSpecialSurface::MakeRaster(SkImageFilter::Proxy* proxy
 
 class SkSpecialSurface_Gpu : public SkSpecialSurface_Base {
 public:
-    SkSpecialSurface_Gpu(SkImageFilter::Proxy* proxy,
-                         GrTexture* texture,
+    SkSpecialSurface_Gpu(GrTexture* texture,
                          const SkIRect& subset,
                          const SkSurfaceProps* props)
-        : INHERITED(proxy, subset, props)
+        : INHERITED(subset, props)
         , fTexture(SkRef(texture)) {
 
         SkASSERT(fTexture->asRenderTarget());
@@ -141,7 +133,7 @@ public:
     ~SkSpecialSurface_Gpu() override { }
 
     sk_sp<SkSpecialImage> onMakeImageSnapshot() override {
-        return SkSpecialImage::MakeFromGpu(this->proxy(), this->subset(),
+        return SkSpecialImage::MakeFromGpu(this->subset(),
                                            kNeedNewImageUniqueID_SpecialImage, fTexture,
                                            &this->props());
     }
@@ -152,19 +144,17 @@ private:
     typedef SkSpecialSurface_Base INHERITED;
 };
 
-sk_sp<SkSpecialSurface> SkSpecialSurface::MakeFromTexture(SkImageFilter::Proxy* proxy,
-                                                          const SkIRect& subset,
+sk_sp<SkSpecialSurface> SkSpecialSurface::MakeFromTexture(const SkIRect& subset,
                                                           GrTexture* texture,
                                                           const SkSurfaceProps* props) {
     if (!texture->asRenderTarget()) {
         return nullptr;
     }
 
-    return sk_make_sp<SkSpecialSurface_Gpu>(proxy, texture, subset, props);
+    return sk_make_sp<SkSpecialSurface_Gpu>(texture, subset, props);
 }
 
-sk_sp<SkSpecialSurface> SkSpecialSurface::MakeRenderTarget(SkImageFilter::Proxy* proxy,
-                                                           GrContext* context,
+sk_sp<SkSpecialSurface> SkSpecialSurface::MakeRenderTarget(GrContext* context,
                                                            const GrSurfaceDesc& desc,
                                                            const SkSurfaceProps* props) {
     if (!context || !SkToBool(desc.fFlags & kRenderTarget_GrSurfaceFlag)) {
@@ -178,20 +168,18 @@ sk_sp<SkSpecialSurface> SkSpecialSurface::MakeRenderTarget(SkImageFilter::Proxy*
 
     const SkIRect subset = SkIRect::MakeWH(desc.fWidth, desc.fHeight);
 
-    return sk_make_sp<SkSpecialSurface_Gpu>(proxy, temp, subset, props);
+    return sk_make_sp<SkSpecialSurface_Gpu>(temp, subset, props);
 }
 
 #else
 
-sk_sp<SkSpecialSurface> SkSpecialSurface::MakeFromTexture(SkImageFilter::Proxy* proxy,
-                                                          const SkIRect& subset,
+sk_sp<SkSpecialSurface> SkSpecialSurface::MakeFromTexture(const SkIRect& subset,
                                                           GrTexture*,
                                                           const SkSurfaceProps*) {
     return nullptr;
 }
 
-sk_sp<SkSpecialSurface> SkSpecialSurface::MakeRenderTarget(SkImageFilter::Proxy* proxy,
-                                                           GrContext* context,
+sk_sp<SkSpecialSurface> SkSpecialSurface::MakeRenderTarget(GrContext* context,
                                                            const GrSurfaceDesc& desc,
                                                            const SkSurfaceProps* props) {
     return nullptr;