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

tests/ImageFilterCacheTest.cpp

Index: tests/ImageFilterCacheTest.cpp
diff --git a/tests/ImageFilterCacheTest.cpp b/tests/ImageFilterCacheTest.cpp
index 688069ea45908a8fb6958515ff0936aa51bb25ea..40c805a14ec9c140e38d42bca088c49a981d545d 100644
--- a/tests/ImageFilterCacheTest.cpp
+++ b/tests/ImageFilterCacheTest.cpp
@@ -138,11 +138,11 @@ DEF_TEST(ImageFilterCache_RasterBacked, reporter) {
 
     const SkIRect& full = SkIRect::MakeWH(kFullSize, kFullSize);
 
-    sk_sp<SkSpecialImage> fullImg(SkSpecialImage::MakeFromRaster(nullptr, full, srcBM));
+    sk_sp<SkSpecialImage> fullImg(SkSpecialImage::MakeFromRaster(full, srcBM));
 
     const SkIRect& subset = SkIRect::MakeXYWH(kPad, kPad, kSmallerSize, kSmallerSize);
 
-    sk_sp<SkSpecialImage> subsetImg(SkSpecialImage::MakeFromRaster(nullptr, subset, srcBM));
+    sk_sp<SkSpecialImage> subsetImg(SkSpecialImage::MakeFromRaster(subset, srcBM));
 
     test_find_existing(reporter, fullImg, subsetImg);
     test_dont_find_if_diff_key(reporter, fullImg, subsetImg);
@@ -155,11 +155,11 @@ DEF_TEST(ImageFilterCache_RasterBacked, reporter) {
 static void test_image_backed(skiatest::Reporter* reporter, const sk_sp<SkImage>& srcImage) {
     const SkIRect& full = SkIRect::MakeWH(kFullSize, kFullSize);
 
-    sk_sp<SkSpecialImage> fullImg(SkSpecialImage::MakeFromImage(nullptr, full, srcImage));
+    sk_sp<SkSpecialImage> fullImg(SkSpecialImage::MakeFromImage(full, srcImage));
 
     const SkIRect& subset = SkIRect::MakeXYWH(kPad, kPad, kSmallerSize, kSmallerSize);
 
-    sk_sp<SkSpecialImage> subsetImg(SkSpecialImage::MakeFromImage(nullptr, subset, srcImage));
+    sk_sp<SkSpecialImage> subsetImg(SkSpecialImage::MakeFromImage(subset, srcImage));
 
     test_find_existing(reporter, fullImg, subsetImg);
     test_dont_find_if_diff_key(reporter, fullImg, subsetImg);
@@ -220,13 +220,13 @@ DEF_GPUTEST_FOR_RENDERING_CONTEXTS(ImageFilterCache_GPUBacked, reporter, ctxInfo
 
     const SkIRect& full = SkIRect::MakeWH(kFullSize, kFullSize);
 
-    sk_sp<SkSpecialImage> fullImg(SkSpecialImage::MakeFromGpu(nullptr, full,
+    sk_sp<SkSpecialImage> fullImg(SkSpecialImage::MakeFromGpu(full,
                                                               kNeedNewImageUniqueID_SpecialImage,
                                                               srcTexture));
 
     const SkIRect& subset = SkIRect::MakeXYWH(kPad, kPad, kSmallerSize, kSmallerSize);
 
-    sk_sp<SkSpecialImage> subsetImg(SkSpecialImage::MakeFromGpu(nullptr, subset,
+    sk_sp<SkSpecialImage> subsetImg(SkSpecialImage::MakeFromGpu(subset,
                                                                 kNeedNewImageUniqueID_SpecialImage,
                                                                 srcTexture));