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

core/fpdfapi/render/cpdf_devicebuffer.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/render/cpdf_devicebuffer.h"
 
 #include "core/fpdfapi/page/cpdf_pageobject.h"
 #include "core/fpdfapi/render/cpdf_rendercontext.h"
 #include "core/fpdfapi/render/cpdf_renderoptions.h"
 #include "core/fxge/cfx_fxgedevice.h"
 #include "core/fxge/cfx_renderdevice.h"
 #include "core/fxge/fx_dib.h"
+#include "third_party/base/ptr_util.h"
 
 CPDF_DeviceBuffer::CPDF_DeviceBuffer()
     : m_pDevice(nullptr), m_pContext(nullptr), m_pObject(nullptr) {}
 
 CPDF_DeviceBuffer::~CPDF_DeviceBuffer() {}
 
 bool CPDF_DeviceBuffer::Initialize(CPDF_RenderContext* pContext,
                                    CFX_RenderDevice* pDevice,
                                    FX_RECT* pRect,
                                    const CPDF_PageObject* pObj,
@@ skipping 17 matching lines @@
       m_Matrix.Scale(1.0f, (FX_FLOAT)(max_dpi) / (FX_FLOAT)dpiv);
   }
 #endif
   CFX_Matrix ctm = m_pDevice->GetCTM();
   FX_FLOAT fScaleX = FXSYS_fabs(ctm.a);
   FX_FLOAT fScaleY = FXSYS_fabs(ctm.d);
   m_Matrix.Concat(fScaleX, 0, 0, fScaleY, 0, 0);
   CFX_FloatRect rect(*pRect);
   m_Matrix.TransformRect(rect);
   FX_RECT bitmap_rect = rect.GetOuterRect();
-  m_pBitmap.reset(new CFX_DIBitmap);
+  m_pBitmap = pdfium::MakeUnique<CFX_DIBitmap>();
   m_pBitmap->Create(bitmap_rect.Width(), bitmap_rect.Height(), FXDIB_Argb);
   return true;
 }
 
 void CPDF_DeviceBuffer::OutputToDevice() {
   if (m_pDevice->GetDeviceCaps(FXDC_RENDER_CAPS) & FXRC_GET_BITS) {
     if (m_Matrix.a == 1.0f && m_Matrix.d == 1.0f) {
       m_pDevice->SetDIBits(m_pBitmap.get(), m_Rect.left, m_Rect.top);
     } else {
       m_pDevice->StretchDIBits(m_pBitmap.get(), m_Rect.left, m_Rect.top,
                                m_Rect.Width(), m_Rect.Height());
     }
     return;
   }
   CFX_DIBitmap buffer;
   m_pDevice->CreateCompatibleBitmap(&buffer, m_pBitmap->GetWidth(),
                                     m_pBitmap->GetHeight());
   m_pContext->GetBackground(&buffer, m_pObject, nullptr, &m_Matrix);
   buffer.CompositeBitmap(0, 0, buffer.GetWidth(), buffer.GetHeight(),
                          m_pBitmap.get(), 0, 0);
   m_pDevice->StretchDIBits(&buffer, m_Rect.left, m_Rect.top, m_Rect.Width(),
                            m_Rect.Height());
 }