Revert postscript code removal.

BUILD.gn

 # Copyright 2016 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build_overrides/v8.gni")
 import("//testing/test.gni")
 import("pdfium.gni")
 
 config("pdfium_common_config") {
   cflags = []
@@ skipping 876 matching lines @@
     deps += [ "third_party:fx_agg" ]
 
     if (is_mac) {
       sources += [ "core/fxge/apple/fx_apple_platform.cpp" ]
     }
   }
 
   if (is_win) {
     sources += [
       "core/fxge/win32/dwrite_int.h",
+      "core/fxge/win32/fx_ge_ps.cpp",
+      "core/fxge/win32/fx_ge_ps.h",
       "core/fxge/win32/fx_win32_device.cpp",
       "core/fxge/win32/fx_win32_dib.cpp",
       "core/fxge/win32/fx_win32_dwrite.cpp",
       "core/fxge/win32/fx_win32_gdipext.cpp",
       "core/fxge/win32/fx_win32_print.cpp",
       "core/fxge/win32/win32_int.h",
     ]
     configs -= [ "//build/config/win:lean_and_mean" ]
   }
 
@@ skipping 908 matching lines @@
       "//samples",
     ]
   }
   group("fuzzers") {
     testonly = true
     deps = [
       "//testing/libfuzzer",
     ]
   }
 }