Fix (nearly all) IWYU in fpdfskd/include/javascript/ headers.

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.
 
 import("//testing/test.gni")
 
 pdf_use_skia = false
 
 declare_args() {
   # On Android there's no system FreeType. On Windows and Mac, only a few
@@ skipping 721 matching lines @@
   sources = [
     "fpdfsdk/include/javascript/Consts.h",
     "fpdfsdk/include/javascript/Document.h",
     "fpdfsdk/include/javascript/Field.h",
     "fpdfsdk/include/javascript/IJavaScript.h",
     "fpdfsdk/include/javascript/Icon.h",
     "fpdfsdk/include/javascript/JS_Context.h",
     "fpdfsdk/include/javascript/JS_Define.h",
     "fpdfsdk/include/javascript/JS_EventHandler.h",
     "fpdfsdk/include/javascript/JS_GlobalData.h",
-    "fpdfsdk/include/javascript/JS_Module.h",
     "fpdfsdk/include/javascript/JS_Object.h",
     "fpdfsdk/include/javascript/JS_Runtime.h",
     "fpdfsdk/include/javascript/JS_Value.h",
     "fpdfsdk/include/javascript/JavaScript.h",
     "fpdfsdk/include/javascript/PublicMethods.h",
     "fpdfsdk/include/javascript/app.h",
     "fpdfsdk/include/javascript/color.h",
     "fpdfsdk/include/javascript/console.h",
     "fpdfsdk/include/javascript/event.h",
     "fpdfsdk/include/javascript/global.h",
@@ skipping 131 matching lines @@
     "//testing/gtest",
     ":pdfium",
   ]
   include_dirs = [ "." ]
   configs -= [ "//build/config/compiler:chromium_code" ]
   configs += [
     ":pdfium_config",
     "//build/config/compiler:no_chromium_code",
   ]
 }