SkPDF: Stop `#include PREPROCESSOR_DEFINE` pattern

BUILD.gn

 # Copyright 2016 Google Inc.
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 declare_args() {
   skia_enable_tools = !is_fuchsia && !is_component_build
 
   skia_use_expat = true
   skia_use_giflib = !is_fuchsia
@@ skipping 267 matching lines @@
   enabled = skia_use_zlib
   public_defines = []
 
   deps = [
     "//third_party/zlib",
   ]
   sources = pdf_gypi.sources
 
   if (skia_use_sfntly) {
     deps += [ "//third_party/sfntly" ]
-    public_defines += [
-      # TODO(halcanary): make this the default; this is the value Android uses.
-      "SK_SFNTLY_SUBSETTER=\"sample/chromium/font_subsetter.h\"",
-    ]
+    public_defines += [ "SK_PDF_USE_SFNTLY" ]
   }
 }
 
 optional("png") {
   enabled = skia_use_libpng
   public_defines = [ "SK_HAS_PNG_LIBRARY" ]
 
   deps = [
     "//third_party/libpng",
   ]
@@ skipping 449 matching lines @@
       "tools/SkShaper_harfbuzz.cpp",
       "tools/using_skia_and_harfbuzz.cpp",
     ]
     deps = [
       ":skia",
       "//third_party/harfbuzz",
     ]
     testonly = true
   }
 }