Avoid the ptr.reset(new XXX()) anti-pattern

xfa/fde/cfde_txtedtpage.cpp

Index: xfa/fde/cfde_txtedtpage.cpp
diff --git a/xfa/fde/cfde_txtedtpage.cpp b/xfa/fde/cfde_txtedtpage.cpp
index 0abb1d69f3cf8d5d015a29d09654dffbe074d103..51621dae1c32f4e4c53c1b5714e9f14cd6c01bfa 100644
--- a/xfa/fde/cfde_txtedtpage.cpp
+++ b/xfa/fde/cfde_txtedtpage.cpp
@@ -8,6 +8,7 @@
 
 #include <algorithm>
 
+#include "third_party/base/ptr_util.h"
 #include "xfa/fde/cfde_txtedtbuf.h"
 #include "xfa/fde/cfde_txtedtbufiter.h"
 #include "xfa/fde/cfde_txtedtengine.h"
@@ -303,7 +304,7 @@ int32_t CFDE_TxtEdtPage::LoadPage(const CFX_RectF* pClipBox,
       (bVertial && bLineReserve) ? (-pParams->fLineSpace) : pParams->fLineSpace;
   FX_FLOAT fLinePos = fLineStart;
   if (!m_pTextSet)
-    m_pTextSet.reset(new CFDE_TxtEdtTextSet(this));
+    m_pTextSet = pdfium::MakeUnique<CFDE_TxtEdtTextSet>(this);
 
   m_PieceMassArr.RemoveAll(true);
   uint32_t dwBreakStatus = FX_TXTBREAK_None;