Make the vast majority of JS headers private to src/javascript.

fpdfsdk/src/javascript/JS_Object.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
+#include "JS_Object.h"
+
+#include "../../include/fsdk_mgr.h"  // For CPDFDoc_Environment.
 #include "../../include/javascript/IJavaScript.h"
-#include "../../include/javascript/JS_Context.h"
-#include "../../include/javascript/JS_Define.h"
-#include "../../include/javascript/JS_Object.h"
+#include "JS_Context.h"
+#include "JS_Define.h"
 
 namespace {
 
 int FXJS_MsgBox(CPDFDoc_Environment* pApp,
                 const FX_WCHAR* swMsg,
                 const FX_WCHAR* swTitle,
                 FX_UINT nType,
                 FX_UINT nIcon) {
   if (!pApp)
     return 0;
@@ skipping 128 matching lines @@
 // static
 CJS_Timer::TimerMap* CJS_Timer::GetGlobalTimerMap() {
   // Leak the timer array at shutdown.
   static auto* s_TimerMap = new TimerMap;
   return s_TimerMap;
 }
 
 void CJS_Timer::OnDestroyed() {
   m_bValid = false;
 }