Replace some calls to Release() with direct delete, part 1.

xfa/fwl/basewidget/fwl_editimp.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/fwl/basewidget/fwl_editimp.h"
 
 #include <algorithm>
+#include <memory>
 #include <vector>
 
 #include "xfa/fde/fde_gedevice.h"
 #include "xfa/fde/fde_render.h"
 #include "xfa/fee/fde_txtedtengine.h"
 #include "xfa/fee/ifde_txtedtpage.h"
 #include "xfa/fwl/basewidget/fwl_caretimp.h"
 #include "xfa/fwl/basewidget/fwl_comboboximp.h"
 #include "xfa/fwl/basewidget/fwl_scrollbarimp.h"
 #include "xfa/fwl/basewidget/ifwl_caret.h"
@@ skipping 1055 matching lines @@
     param.m_pGraphics = pGraphics;
     param.m_matrix = *pMatrix;
     param.m_pWidget = m_pInterface;
     param.m_iPart = CFWL_Part::Background;
     param.m_pPath = &path;
     pTheme->DrawBackground(&param);
   }
   CFX_RenderDevice* pRenderDev = pGraphics->GetRenderDevice();
   if (!pRenderDev)
     return;
-  CFDE_RenderDevice* pRenderDevice = new CFDE_RenderDevice(pRenderDev, FALSE);
-  CFDE_RenderContext* pRenderContext = new CFDE_RenderContext;
+
+  std::unique_ptr<CFDE_RenderDevice> pRenderDevice(
+      new CFDE_RenderDevice(pRenderDev, FALSE));
+  std::unique_ptr<CFDE_RenderContext> pRenderContext(new CFDE_RenderContext);
   pRenderDevice->SetClipRect(rtClip);
-  pRenderContext->StartRender(pRenderDevice, pPage, mt);
-  pRenderContext->DoRender(NULL);
-  pRenderContext->Release();
-  pRenderDevice->Release();
+  pRenderContext->StartRender(pRenderDevice.get(), pPage, mt);
+  pRenderContext->DoRender(nullptr);
   if (m_pProperties->m_dwStyleExes & FWL_STYLEEXT_EDT_CombText) {
     pGraphics->RestoreGraphState();
     CFX_Path path;
     path.Create();
     int32_t iLimit = m_nLimit > 0 ? m_nLimit : 1;
     FX_FLOAT fStep = m_rtEngine.width / iLimit;
     FX_FLOAT fLeft = m_rtEngine.left + 1;
     for (int32_t i = 1; i < iLimit; i++) {
       fLeft += fStep;
       path.AddLine(fLeft, m_rtClient.top, fLeft, m_rtClient.bottom());
     }
     CFWL_ThemeBackground param;
     param.m_pGraphics = pGraphics;
     param.m_matrix = *pMatrix;
     param.m_pWidget = m_pInterface;
     param.m_iPart = CFWL_Part::CombTextLine;
     param.m_pPath = &path;
     pTheme->DrawBackground(&param);
   }
   pGraphics->RestoreGraphState();
 }
+
 void CFWL_EditImp::UpdateEditEngine() {
   UpdateEditParams();
   UpdateEditLayout();
   if (m_nLimit > -1) {
     m_pEdtEngine->SetLimit(m_nLimit);
   }
 }
 void CFWL_EditImp::UpdateEditParams() {
   FDE_TXTEDTPARAMS params;
   params.nHorzScale = 100;
@@ skipping 1081 matching lines @@
     }
     CFX_RectF rect;
     m_pOwner->GetWidgetRect(rect);
     CFX_RectF rtInvalidate;
     rtInvalidate.Set(0, 0, rect.width + 2, rect.height + 2);
     m_pOwner->Repaint(&rtInvalidate);
   }
   return TRUE;
 }
 void CFWL_EditImpDelegate::DoCursor(CFWL_MsgMouse* pMsg) {}