Rename IFX_ stream names

fpdfsdk/cpdfsdk_formfillenvironment.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_formfillenvironment.h"
 
 #include <memory>
 
@@ skipping 452 matching lines @@
 }
 
 FPDF_FILEHANDLER* CPDFSDK_FormFillEnvironment::OpenFile(int fileType,
                                                         FPDF_WIDESTRING wsURL,
                                                         const char* mode) {
   if (m_pInfo && m_pInfo->FFI_OpenFile)
     return m_pInfo->FFI_OpenFile(m_pInfo, fileType, wsURL, mode);
   return nullptr;
 }
 
-IFX_FileRead* CPDFSDK_FormFillEnvironment::DownloadFromURL(
+IFX_SeekableReadStream* CPDFSDK_FormFillEnvironment::DownloadFromURL(
     const FX_WCHAR* url) {
   if (!m_pInfo || !m_pInfo->FFI_DownloadFromURL)
     return nullptr;
 
   CFX_ByteString bstrURL = CFX_WideString(url).UTF16LE_Encode();
   FPDF_WIDESTRING wsURL =
       (FPDF_WIDESTRING)bstrURL.GetBuffer(bstrURL.GetLength());
 
   FPDF_LPFILEHANDLER fileHandler = m_pInfo->FFI_DownloadFromURL(m_pInfo, wsURL);
 
@@ skipping 277 matching lines @@
     } else {
       m_pFocusAnnot.Reset(pFocusAnnot.Get());
     }
   }
   return FALSE;
 }
 
 FX_BOOL CPDFSDK_FormFillEnvironment::GetPermissions(int nFlag) {
   return GetPDFDocument()->GetUserPermissions() & nFlag;
 }