Keep only base/extractor.[cc|h].

third_party/lzma/v4_65/files/CPP/7zip/UI/Common/DefaultName.cpp

-// DefaultName.cpp
-
-#include "StdAfx.h"
-
-#include "DefaultName.h"
-
-static UString GetDefaultName3(const UString &fileName,
-    const UString &extension, const UString &addSubExtension)
-{
-  int extLength = extension.Length();
-  int fileNameLength = fileName.Length();
-  if (fileNameLength > extLength + 1)
-  {
-    int dotPos = fileNameLength - (extLength + 1);
-    if (fileName[dotPos] == '.')
-      if (extension.CompareNoCase(fileName.Mid(dotPos + 1)) == 0)
-        return fileName.Left(dotPos) + addSubExtension;
-  }
-  int dotPos = fileName.ReverseFind(L'.');
-  if (dotPos > 0)
-    return fileName.Left(dotPos) + addSubExtension;
-
-  if (addSubExtension.IsEmpty())
-    return fileName + L"~";
-  else
-    return fileName + addSubExtension;
-}
-
-UString GetDefaultName2(const UString &fileName,
-    const UString &extension, const UString &addSubExtension)
-{
-  UString name = GetDefaultName3(fileName, extension, addSubExtension);
-  name.TrimRight();
-  return name;
-}