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

xfa/fde/css/fde_cssstyleselector.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/css/fde_cssstyleselector.h"
 
 #include <algorithm>
 #include <memory>
 
+#include "third_party/base/ptr_util.h"
 #include "third_party/base/stl_util.h"
 #include "xfa/fde/css/fde_csscache.h"
 #include "xfa/fde/css/fde_cssdeclaration.h"
 #include "xfa/fde/css/fde_cssstylesheet.h"
 #include "xfa/fde/css/fde_csssyntax.h"
 #include "xfa/fxfa/app/xfa_textlayout.h"
 
 #define FDE_CSSUNIVERSALHASH ('*')
 
 int32_t CFDE_CSSCounterStyle::FindIndex(const FX_WCHAR* pszIdentifier) {
@@ skipping 97 matching lines @@
   Reset();
 }
 
 void CFDE_CSSStyleSelector::SetDefFontSize(FX_FLOAT fFontSize) {
   ASSERT(fFontSize > 0);
   m_fDefFontSize = fFontSize;
 }
 
 CFDE_CSSAccelerator* CFDE_CSSStyleSelector::InitAccelerator() {
   if (!m_pAccelerator)
-    m_pAccelerator.reset(new CFDE_CSSAccelerator);
+    m_pAccelerator = pdfium::MakeUnique<CFDE_CSSAccelerator>();
   m_pAccelerator->Clear();
   return m_pAccelerator.get();
 }
 
 IFDE_CSSComputedStyle* CFDE_CSSStyleSelector::CreateComputedStyle(
     IFDE_CSSComputedStyle* pParentStyle) {
   if (!m_pFixedStyleStore) {
     m_pFixedStyleStore = IFX_MemoryAllocator::Create(
         FX_ALLOCTYPE_Fixed, 16, sizeof(CFDE_CSSComputedStyle));
   }
@@ skipping 1792 matching lines @@
   m_MaxBoxSize.Set(FDE_CSSLENGTHUNIT_None);
   m_eDisplay = FDE_CSSDISPLAY_Inline;
   m_fVerticalAlign = 0.0f;
   m_ColumnCount.Set(FDE_CSSLENGTHUNIT_Auto);
   m_ColumnGap.Set(FDE_CSSLENGTHUNIT_Normal);
   m_bColumnRuleColorSame = true;
   m_ColumnWidth.Set(FDE_CSSLENGTHUNIT_Auto);
   m_ColumnRuleWidth.Set(FDE_CSSLENGTHUNIT_Auto);
   m_eTextCombine = FDE_CSSTEXTCOMBINE_None;
 }