Split off CPDF_Parser and CPDF_SimpleParser into .h/.cpp files

core/src/fpdfapi/fpdf_parser/cpdf_document.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 "core/include/fpdfapi/cpdf_document.h"
 
 #include <set>
 
+#include "core/include/fpdfapi/cpdf_parser.h"
 #include "core/include/fpdfapi/fpdf_module.h"
 #include "core/include/fpdfapi/fpdf_parser.h"
 #include "core/include/fxge/fx_font.h"
 #include "core/src/fpdfapi/fpdf_render/render_int.h"
 #include "third_party/base/stl_util.h"
 
 namespace {
 
 int CountPages(CPDF_Dictionary* pPages,
                std::set<CPDF_Dictionary*>* visited_pages) {
@@ skipping 320 matching lines @@
 }
 
 void CPDF_Document::ClearRenderFont() {
   if (!m_pDocRender)
     return;
 
   CFX_FontCache* pCache = m_pDocRender->GetFontCache();
   if (pCache)
     pCache->FreeCache(FALSE);
 }