Use smart pointers for class owned pointers

xfa/fwl/basewidget/fwl_caretimp.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_caretimp.h"
 
 #include "xfa/fwl/basewidget/ifwl_caret.h"
 #include "xfa/fwl/core/cfwl_themebackground.h"
@@ skipping 20 matching lines @@
 FWL_Error IFWL_Caret::SetFrequency(uint32_t elapse) {
   return static_cast<CFWL_CaretImp*>(GetImpl())->SetFrequency(elapse);
 }
 FWL_Error IFWL_Caret::SetColor(CFX_Color crFill) {
   return static_cast<CFWL_CaretImp*>(GetImpl())->SetColor(crFill);
 }
 
 CFWL_CaretImp::CFWL_CaretImp(const CFWL_WidgetImpProperties& properties,
                              IFWL_Widget* pOuter)
     : CFWL_WidgetImp(properties, pOuter),
+      m_pTimer(new CFWL_CaretTimer(this)),
       m_pTimerInfo(nullptr),
       m_dwElapse(400),
       m_bSetColor(FALSE) {
-  m_pTimer = new CFWL_CaretTimer(this);
   SetStates(FWL_STATE_CAT_HightLight);
 }
 
-CFWL_CaretImp::~CFWL_CaretImp() {
-  delete m_pTimer;
-}
+CFWL_CaretImp::~CFWL_CaretImp() {}
 
 FWL_Error CFWL_CaretImp::GetClassName(CFX_WideString& wsClass) const {
   wsClass = FWL_CLASS_Caret;
   return FWL_Error::Succeeded;
 }
 
 FWL_Type CFWL_CaretImp::GetClassID() const {
   return FWL_Type::Caret;
 }
 
@@ skipping 89 matching lines @@
 
 CFWL_CaretImpDelegate::CFWL_CaretImpDelegate(CFWL_CaretImp* pOwner)
     : m_pOwner(pOwner) {}
 
 void CFWL_CaretImpDelegate::OnProcessMessage(CFWL_Message* pMessage) {}
 
 void CFWL_CaretImpDelegate::OnDrawWidget(CFX_Graphics* pGraphics,
                                          const CFX_Matrix* pMatrix) {
   m_pOwner->DrawWidget(pGraphics, pMatrix);
 }