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

core/fpdfapi/page/cpdf_page.cpp

 // Copyright 2016 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 "core/fpdfapi/page/cpdf_page.h"
 
 #include <set>
 #include <utility>
 
 #include "core/fpdfapi/cpdf_pagerendercontext.h"
 #include "core/fpdfapi/page/cpdf_contentparser.h"
 #include "core/fpdfapi/page/cpdf_pageobject.h"
 #include "core/fpdfapi/page/pageint.h"
 #include "core/fpdfapi/parser/cpdf_array.h"
 #include "core/fpdfapi/parser/cpdf_dictionary.h"
 #include "core/fpdfapi/parser/cpdf_object.h"
 #include "core/fpdfapi/render/cpdf_pagerendercache.h"
+#include "third_party/base/ptr_util.h"
 #include "third_party/base/stl_util.h"
 
 CPDF_Page::CPDF_Page(CPDF_Document* pDocument,
                      CPDF_Dictionary* pPageDict,
                      bool bPageCache)
     : m_PageWidth(100),
       m_PageHeight(100),
       m_pView(nullptr),
       m_pPageRender(bPageCache ? new CPDF_PageRenderCache(this) : nullptr) {
   m_pFormDict = pPageDict;
@@ skipping 51 matching lines @@
   m_Transparency = PDFTRANS_ISOLATED;
   LoadTransInfo();
 }
 
 CPDF_Page::~CPDF_Page() {}
 
 void CPDF_Page::StartParse() {
   if (m_ParseState == CONTENT_PARSED || m_ParseState == CONTENT_PARSING)
     return;
 
-  m_pParser.reset(new CPDF_ContentParser);
+  m_pParser = pdfium::MakeUnique<CPDF_ContentParser>();
   m_pParser->Start(this);
   m_ParseState = CONTENT_PARSING;
 }
 
 void CPDF_Page::ParseContent() {
   StartParse();
   ContinueParse(nullptr);
 }
 
 void CPDF_Page::SetRenderContext(
@@ skipping 66 matching lines @@
       x2 = xPos + xSize;
       y2 = yPos;
       break;
   }
   display_matrix.Set((x2 - x0) / m_PageWidth, (y2 - y0) / m_PageWidth,
                      (x1 - x0) / m_PageHeight, (y1 - y0) / m_PageHeight, x0,
                      y0);
   matrix = m_PageMatrix;
   matrix.Concat(display_matrix);
 }