Split fpdfdoc/include/fpdf_doc.h into individual classes.

core/fpdfdoc/doc_viewerPreferences.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/fpdfdoc/include/cpdf_viewerpreferences.h"
+
 #include "core/fpdfapi/fpdf_parser/include/cpdf_document.h"
-#include "core/fpdfdoc/include/fpdf_doc.h"
 
 CPDF_ViewerPreferences::CPDF_ViewerPreferences(CPDF_Document* pDoc)
     : m_pDoc(pDoc) {}
 
 CPDF_ViewerPreferences::~CPDF_ViewerPreferences() {}
 
 FX_BOOL CPDF_ViewerPreferences::IsDirectionR2L() const {
   CPDF_Dictionary* pDict = GetViewerPreferences();
   return pDict ? pDict->GetStringBy("Direction") == "R2L" : FALSE;
 }
@@ skipping 15 matching lines @@
 
 CFX_ByteString CPDF_ViewerPreferences::Duplex() const {
   CPDF_Dictionary* pDict = GetViewerPreferences();
   return pDict ? pDict->GetStringBy("Duplex") : CFX_ByteString("None");
 }
 
 CPDF_Dictionary* CPDF_ViewerPreferences::GetViewerPreferences() const {
   CPDF_Dictionary* pDict = m_pDoc->GetRoot();
   return pDict ? pDict->GetDictBy("ViewerPreferences") : nullptr;
 }