Move fxcrt::{Byte,Wide}Strings with std::move().chromium/3466

Remove some string copies in barcode that were noticed whilst
looking for moves.

Change-Id: Ieda34d00f633576ba1f0dca283dcdabfb36f236c
Reviewed-on: https://pdfium-review.googlesource.com/35410
Reviewed-by: dsinclair <dsinclair@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/core/fpdfapi/font/cpdf_tounicodemap.cpp b/core/fpdfapi/font/cpdf_tounicodemap.cpp
index 7b5936c31e..e8917310a2 100644
--- a/core/fpdfapi/font/cpdf_tounicodemap.cpp
+++ b/core/fpdfapi/font/cpdf_tounicodemap.cpp
@@ -6,6 +6,8 @@
 
 #include "core/fpdfapi/font/cpdf_tounicodemap.h"
 
+#include <utility>
+
 #include "core/fpdfapi/cpdf_modulemgr.h"
 #include "core/fpdfapi/font/cpdf_cid2unicodemap.h"
 #include "core/fpdfapi/page/cpdf_pagemodule.h"
@@ -205,7 +207,7 @@ void CPDF_ToUnicodeMap::Load(const CPDF_Stream* pStream) {
               m_Map[code] = GetUnicode();
               m_MultiCharBuf.AppendChar(retcode.GetLength());
               m_MultiCharBuf << retcode;
-              destcode = retcode;
+              destcode = std::move(retcode);
             }
           }
         }