Unify some code

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 482 matching lines @@
     "core/fpdfapi/parser/cpdf_data_avail.cpp",
     "core/fpdfapi/parser/cpdf_data_avail.h",
     "core/fpdfapi/parser/cpdf_dictionary.cpp",
     "core/fpdfapi/parser/cpdf_dictionary.h",
     "core/fpdfapi/parser/cpdf_document.cpp",
     "core/fpdfapi/parser/cpdf_document.h",
     "core/fpdfapi/parser/cpdf_hint_tables.cpp",
     "core/fpdfapi/parser/cpdf_hint_tables.h",
     "core/fpdfapi/parser/cpdf_indirect_object_holder.cpp",
     "core/fpdfapi/parser/cpdf_indirect_object_holder.h",
+    "core/fpdfapi/parser/cpdf_linearized.cpp",
+    "core/fpdfapi/parser/cpdf_linearized.h",
     "core/fpdfapi/parser/cpdf_name.cpp",
     "core/fpdfapi/parser/cpdf_name.h",
     "core/fpdfapi/parser/cpdf_null.cpp",
     "core/fpdfapi/parser/cpdf_null.h",
     "core/fpdfapi/parser/cpdf_number.cpp",
     "core/fpdfapi/parser/cpdf_number.h",
     "core/fpdfapi/parser/cpdf_object.cpp",
     "core/fpdfapi/parser/cpdf_object.h",
     "core/fpdfapi/parser/cpdf_parser.cpp",
     "core/fpdfapi/parser/cpdf_parser.h",
@@ skipping 1241 matching lines @@
 }
 
 if (pdf_is_standalone) {
   source_set("samples") {
     testonly = true
     deps = [
       "//samples",
     ]
   }
 }