Move xfa_document to cxfa_document

This moves the code to match the actual class name.

Review-Url: https://codereview.chromium.org/2163133004
diff --git a/xfa/fxfa/parser/cxfa_document_parser.cpp b/xfa/fxfa/parser/cxfa_document_parser.cpp
index ff54fb3..daf5221 100644
--- a/xfa/fxfa/parser/cxfa_document_parser.cpp
+++ b/xfa/fxfa/parser/cxfa_document_parser.cpp
@@ -7,7 +7,7 @@
 #include "xfa/fxfa/parser/cxfa_document_parser.h"
 
 #include "xfa/fxfa/include/fxfa.h"
-#include "xfa/fxfa/parser/xfa_document.h"
+#include "xfa/fxfa/parser/cxfa_document.h"
 
 CXFA_DocumentParser::CXFA_DocumentParser(CXFA_FFNotify* pNotify)
     : m_nodeParser(nullptr, TRUE), m_pNotify(pNotify) {}