Subclass the stream implementations from CFGAS_Stream

Rename CFGAS_TextStream to CFGAS_Stream. CFGAS_Stream is converted
to a base class instead of accepting an IFGAS_StreamImp. Things
which inherted from IFGAS_StreamImp now inherit from CFGAS_Stream.

The stream type inputs are changed to IFX_SeekableStream so that
they can accept the same type (IFX_SeekableStream is an
IFX_SeekableWriteStream and an IFX_SeekableReadStream). This way
the storage can be shared in the base class.

Change-Id: I06645071e68e2a4d4120c0e336529f2c18c2b705
Reviewed-on: https://pdfium-review.googlesource.com/4152
Commit-Queue: dsinclair <dsinclair@chromium.org>
Reviewed-by: Nicolás Peña <npm@chromium.org>

1 files changed, 5 insertions, 6 deletions

diff --git a/xfa/fxfa/parser/cxfa_dataexporter.cpp b/xfa/fxfa/parser/cxfa_dataexporter.cpp
index 3976fd6912..4e3b0b3ffa 100644
--- a/xfa/fxfa/parser/cxfa_dataexporter.cpp
+++ b/xfa/fxfa/parser/cxfa_dataexporter.cpp
@@ -474,15 +474,14 @@ CXFA_DataExporter::CXFA_DataExporter(CXFA_Document* pDocument)
 }
 
 bool CXFA_DataExporter::Export(
-    const CFX_RetainPtr<IFX_SeekableWriteStream>& pWrite) {
+    const CFX_RetainPtr<IFX_SeekableStream>& pWrite) {
   return Export(pWrite, m_pDocument->GetRoot(), 0, nullptr);
 }
 
-bool CXFA_DataExporter::Export(
-    const CFX_RetainPtr<IFX_SeekableWriteStream>& pWrite,
-    CXFA_Node* pNode,
-    uint32_t dwFlag,
-    const char* pChecksum) {
+bool CXFA_DataExporter::Export(const CFX_RetainPtr<IFX_SeekableStream>& pWrite,
+                               CXFA_Node* pNode,
+                               uint32_t dwFlag,
+                               const char* pChecksum) {
   ASSERT(pWrite);
   if (!pWrite)
     return false;