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

xfa/fde/cfde_txtedtengine.cpp

 // 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
 
 #include "xfa/fde/cfde_txtedtengine.h"
 
 #include <algorithm>
 
@@ skipping 64 matching lines @@
 
 CFDE_TxtEdtEngine::~CFDE_TxtEdtEngine() {
   RemoveAllParags();
   RemoveAllPages();
   m_Param.pEventSink = nullptr;
   ClearSelection();
 }
 
 void CFDE_TxtEdtEngine::SetEditParams(const FDE_TXTEDTPARAMS& params) {
   if (!m_pTextBreak)
-    m_pTextBreak.reset(new CFX_TxtBreak(FX_TXTBREAKPOLICY_None));
+    m_pTextBreak = pdfium::MakeUnique<CFX_TxtBreak>(FX_TXTBREAKPOLICY_None);
 
   FXSYS_memcpy(&m_Param, &params, sizeof(FDE_TXTEDTPARAMS));
   m_wLineEnd = params.wLineBreakChar;
   m_bAutoLineEnd = (m_Param.nLineEnd == FDE_TXTEDIT_LINEEND_Auto);
   UpdateTxtBreak();
 }
 
 FDE_TXTEDTPARAMS* CFDE_TxtEdtEngine::GetEditParams() {
   return &m_Param;
 }
@@ skipping 1514 matching lines @@
       m_SelRangePtrArr.RemoveAt(nCountRange);
       DeleteRange_DoRecord(nSelStart, nSelCount, true);
     }
     ClearSelection();
     m_Param.pEventSink->OnTextChanged(m_ChangeInfo);
     m_Param.pEventSink->OnSelChanged();
     SetCaretPos(nSelStart, true);
     return;
   }
 }