Cleanup: Remove unused pdf resource header files.

pdf/BUILD.gn

 # Copyright 2014 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.
 
 pdf_engine = 0  # 0 PDFium
 
 static_library("pdf") {
   sources = [
     "chunk_stream.cc",
     "chunk_stream.h",
     "document_loader.cc",
     "document_loader.h",
     "draw_utils.cc",
     "draw_utils.h",
     "out_of_process_instance.cc",
     "out_of_process_instance.h",
     "paint_aggregator.cc",
     "paint_aggregator.h",
     "paint_manager.cc",
     "paint_manager.h",
     "pdf.cc",
     "pdf.h",
     "pdf_engine.h",
     "preview_mode_client.cc",
     "preview_mode_client.h",
-    "resource.h",
-    "resource_consts.h",
   ]
 
   # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
   configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
 
   if (pdf_engine == 0) {
     sources += [
       "pdfium/pdfium_api_string_buffer_adapter.cc",
       "pdfium/pdfium_api_string_buffer_adapter.h",
       "pdfium/pdfium_assert_matching_enums.cc",
@@ skipping 14 matching lines @@
     "//base",
     "//components/ui/zoom",
     "//content/public/common",
     "//gin",
     "//net",
     "//ppapi/cpp:objects",
     "//ppapi/cpp/private:internal_module",
     "//third_party/pdfium",
   ]
 }