Move xfa/src up to xfa/.

This CL moves the xfa/src files up to the xfa/ directory and fixes the includes,
include guards, and build files.

R=tsepez@chromium.org

Review URL: https://codereview.chromium.org/1803723002 .
diff --git a/xfa/fxbarcode/BC_UtilCodingConvert.h b/xfa/fxbarcode/BC_UtilCodingConvert.h
new file mode 100644
index 0000000..2d5c9f3
--- /dev/null
+++ b/xfa/fxbarcode/BC_UtilCodingConvert.h
@@ -0,0 +1,29 @@
+// Copyright 2014 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
+
+#ifndef XFA_FXBARCODE_BC_UTILCODINGCONVERT_H_
+#define XFA_FXBARCODE_BC_UTILCODINGCONVERT_H_
+
+#include "core/include/fxcrt/fx_basic.h"
+
+class CBC_UtilCodingConvert {
+ public:
+  CBC_UtilCodingConvert();
+  virtual ~CBC_UtilCodingConvert();
+  static void UnicodeToLocale(const CFX_WideString& source,
+                              CFX_ByteString& result);
+  static void LocaleToUtf8(const CFX_ByteString& source,
+                           CFX_ByteString& result);
+  static void LocaleToUtf8(const CFX_ByteString& source, CFX_ByteArray& result);
+  static void Utf8ToLocale(const CFX_ByteArray& source, CFX_ByteString& result);
+  static void Utf8ToLocale(const uint8_t* source,
+                           int32_t count,
+                           CFX_ByteString& result);
+  static void UnicodeToUTF8(const CFX_WideString& source,
+                            CFX_ByteString& result);
+};
+
+#endif  // XFA_FXBARCODE_BC_UTILCODINGCONVERT_H_