Convert pdfium::MakeUnique<> to std::make_unique<> in fxbarcode

Use C++14 features.

-- ensure <memory> included in .cpp or corresponding .h file
-- remove ptr_util.h include unless WrapUnique() (1 case).

Change-Id: I8eb420fbab6c71fe0d153a9e1f9faa1c60fd43de
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/69990
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>
diff --git a/fxbarcode/cbc_ean13.cpp b/fxbarcode/cbc_ean13.cpp
index 934e61c..f1290f7 100644
--- a/fxbarcode/cbc_ean13.cpp
+++ b/fxbarcode/cbc_ean13.cpp
@@ -24,10 +24,8 @@
 #include <memory>
 
 #include "fxbarcode/oned/BC_OnedEAN13Writer.h"
-#include "third_party/base/ptr_util.h"
 
-CBC_EAN13::CBC_EAN13()
-    : CBC_EANCode(pdfium::MakeUnique<CBC_OnedEAN13Writer>()) {}
+CBC_EAN13::CBC_EAN13() : CBC_EANCode(std::make_unique<CBC_OnedEAN13Writer>()) {}
 
 CBC_EAN13::~CBC_EAN13() = default;