Rename fpdfsdk/fpdfxfa files to match contents

fpdfsdk/cpdfsdk_environment.cpp

 // Copyright 2016 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 "fpdfsdk/cpdfsdk_environment.h"
 
 #include <memory>
 
 #include "fpdfsdk/cpdfsdk_annothandlermgr.h"
 #include "fpdfsdk/cpdfsdk_document.h"
 #include "fpdfsdk/formfiller/cffl_interactiveformfiller.h"
 #include "fpdfsdk/fsdk_actionhandler.h"
 #include "fpdfsdk/javascript/ijs_runtime.h"
 #include "third_party/base/ptr_util.h"
 
 #ifdef PDF_ENABLE_XFA
-#include "fpdfsdk/fpdfxfa/fpdfxfa_app.h"
+#include "fpdfsdk/fpdfxfa/cpdfxfa_app.h"
 #endif  // PDF_ENABLE_XFA
 
 namespace {
 
 // NOTE: |bsUTF16LE| must outlive the use of the result. Care must be taken
 // since modifying the result would impact |bsUTF16LE|.
 FPDF_WIDESTRING AsFPDFWideString(CFX_ByteString* bsUTF16LE) {
   return reinterpret_cast<FPDF_WIDESTRING>(
       bsUTF16LE->GetBuffer(bsUTF16LE->GetLength()));
 }
@@ skipping 506 matching lines @@
   delete[] pbuff;
   return wsRet;
 }
 
 void CPDFSDK_Environment::PageEvent(int iPageCount,
                                     uint32_t dwEventType) const {
   if (m_pInfo && m_pInfo->FFI_PageEvent)
     m_pInfo->FFI_PageEvent(m_pInfo, iPageCount, dwEventType);
 }
 #endif  // PDF_ENABLE_XFA