Remove some IFX_* wrappers.

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 725 matching lines @@
     ]
     configs -= [ "//build/config/win:lean_and_mean" ]
   }
 }
 
 static_library("fxedit") {
   sources = [
     "fpdfsdk/fxedit/fxet_ap.cpp",
     "fpdfsdk/fxedit/fxet_edit.cpp",
     "fpdfsdk/fxedit/fxet_list.cpp",
-    "fpdfsdk/fxedit/fxet_module.cpp",
-    "fpdfsdk/fxedit/fxet_pageobjs.cpp",
     "fpdfsdk/fxedit/include/fx_edit.h",
     "fpdfsdk/fxedit/include/fxet_edit.h",
     "fpdfsdk/fxedit/include/fxet_list.h",
   ]
   configs += [ ":pdfium_core_config" ]
 }
 
 static_library("pdfwindow") {
   sources = [
     "fpdfsdk/pdfwindow/PWL_Button.cpp",
@@ skipping 823 matching lines @@
 }
 
 if (pdf_is_standalone) {
   source_set("samples") {
     testonly = true
     deps = [
       "//samples",
     ]
   }
 }