Use smart pointers for class owned pointers

xfa/fwl/basewidget/fwl_tooltipctrlimp.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_tooltipctrlimp.h"
 
 #include "xfa/fde/tto/fde_textout.h"
 #include "xfa/fwl/basewidget/ifwl_tooltip.h"
@@ skipping 30 matching lines @@
 
 IFWL_ToolTip::IFWL_ToolTip() {}
 
 CFWL_ToolTipImp::CFWL_ToolTipImp(const CFWL_WidgetImpProperties& properties,
                                  IFWL_Widget* pOuter)
     : CFWL_FormImp(properties, pOuter),
       m_bBtnDown(FALSE),
       m_dwTTOStyles(FDE_TTOSTYLE_SingleLine),
       m_iTTOAlign(FDE_TTOALIGNMENT_Center),
       m_pTimerInfoShow(nullptr),
-      m_pTimerInfoHide(nullptr),
-      m_pTimer(nullptr) {
+      m_pTimerInfoHide(nullptr) {
   m_rtClient.Set(0, 0, 0, 0);
   m_rtCaption.Set(0, 0, 0, 0);
   m_rtAnchor.Set(0, 0, 0, 0);
   m_TimerShow.m_pToolTip = this;
   m_TimerHide.m_pToolTip = this;
 }
 
-CFWL_ToolTipImp::~CFWL_ToolTipImp() {
-  delete m_pTimer;
-  m_pTimer = nullptr;
-}
+CFWL_ToolTipImp::~CFWL_ToolTipImp() {}
 
 FWL_Error CFWL_ToolTipImp::GetClassName(CFX_WideString& wsClass) const {
   wsClass = FWL_CLASS_ToolTip;
   return FWL_Error::Succeeded;
 }
 
 FWL_Type CFWL_ToolTipImp::GetClassID() const {
   return FWL_Type::ToolTip;
 }
 
@@ skipping 221 matching lines @@
 void CFWL_ToolTipImpDelegate::OnProcessMessage(CFWL_Message* pMessage) {
   CFWL_WidgetImpDelegate::OnProcessMessage(pMessage);
 }
 
 void CFWL_ToolTipImpDelegate::OnProcessEvent(CFWL_Event* pEvent) {}
 
 void CFWL_ToolTipImpDelegate::OnDrawWidget(CFX_Graphics* pGraphics,
                                            const CFX_Matrix* pMatrix) {
   m_pOwner->DrawWidget(pGraphics, pMatrix);
 }