Mark existing image filter entry points that will be going away with Deprecated

tests/PDFPrimitivesTest.cpp

 /*
  * Copyright 2010 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "Resources.h"
 #include "SkBitmap.h"
 #include "SkCanvas.h"
@@ skipping 351 matching lines @@
     TestSubstitute(reporter);
     test_issue1083();
 }
 
 namespace {
 
 class DummyImageFilter : public SkImageFilter {
 public:
     DummyImageFilter(bool visited = false) : SkImageFilter(0, nullptr), fVisited(visited) {}
     ~DummyImageFilter() override {}
-    virtual bool onFilterImage(Proxy*, const SkBitmap& src, const Context&,
-                               SkBitmap* result, SkIPoint* offset) const override {
+    bool onFilterImageDeprecated(Proxy*, const SkBitmap& src, const Context&,
+                                 SkBitmap* result, SkIPoint* offset) const override {
         fVisited = true;
         offset->fX = offset->fY = 0;
         *result = src;
         return true;
     }
     SK_TO_STRING_OVERRIDE()
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(DummyImageFilter)
     bool visited() const { return fVisited; }
 
 private:
@@ skipping 44 matching lines @@
     SkAutoTUnref<SkTypeface> noEmbedTypeface(GetResourceAsTypeface(resource));
     if (noEmbedTypeface) {
         REPORTER_ASSERT(reporter,
                         !SkPDFFont::CanEmbedTypeface(noEmbedTypeface, &canon));
     }
     SkAutoTUnref<SkTypeface> portableTypeface(
             sk_tool_utils::create_portable_typeface(NULL, SkTypeface::kNormal));
     REPORTER_ASSERT(reporter,
                     SkPDFFont::CanEmbedTypeface(portableTypeface, &canon));
 }