XFA: Actually fix all relative includes to third_party.

xfa/src/fxbarcode/BC_Writer.h

Index: xfa/src/fxbarcode/BC_Writer.h
diff --git a/xfa/src/fxbarcode/BC_Writer.h b/xfa/src/fxbarcode/BC_Writer.h
index 5684096925903914e1457b4f7c21394cfc3c7974..b895b81ae4a4dfe17e87ecceae960f39ec67ddff 100644
--- a/xfa/src/fxbarcode/BC_Writer.h
+++ b/xfa/src/fxbarcode/BC_Writer.h
@@ -4,9 +4,13 @@
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
-#ifndef _BC_WRITER_H_
-#define _BC_WRITER_H_
-class CBC_Writer;
+#ifndef XFA_SRC_FXBARCODE_BC_WRITER_H_
+#define XFA_SRC_FXBARCODE_BC_WRITER_H_
+
+#include "core/include/fxcrt/fx_string.h"
+#include "core/include/fxge/fx_dib.h"
+#include "xfa/src/fxbarcode/utils.h"
+
 class CBC_Writer {
  public:
   CBC_Writer();
@@ -41,4 +45,5 @@ class CBC_Writer {
   FX_ARGB m_barColor;
   FX_ARGB m_backgroundColor;
 };
-#endif
+
+#endif  // XFA_SRC_FXBARCODE_BC_WRITER_H_