Split off CPDF_Document into its own .cpp/.h files.

fpdfsdk/src/fsdk_baseannot.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 <algorithm>
 
+#include "core/include/fpdfapi/cpdf_document.h"
 #include "core/include/fxcrt/fx_ext.h"
 #include "fpdfsdk/include/fsdk_baseannot.h"
 #include "fpdfsdk/include/fsdk_define.h"
 #include "fpdfsdk/include/fsdk_mgr.h"
 
 #ifdef PDF_ENABLE_XFA
 #include "fpdfsdk/include/fpdfxfa/fpdfxfa_doc.h"
 #endif  // PDF_ENABLE_XFA
 
 int gAfxGetTimeZoneInSeconds(int8_t tzhour, uint8_t tzminute) {
@@ skipping 937 matching lines @@
 
 CPDF_Page* CPDFSDK_Annot::GetPDFPage() {
   return m_pPageView ? m_pPageView->GetPDFPage() : nullptr;
 }
 
 #ifdef PDF_ENABLE_XFA
 CPDFXFA_Page* CPDFSDK_Annot::GetPDFXFAPage() {
   return m_pPageView ? m_pPageView->GetPDFXFAPage() : nullptr;
 }
 #endif  // PDF_ENABLE_XFA