Do not check pointers before deleting them.

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 26 matching lines @@
 
 CFWL_CaretImp::CFWL_CaretImp(const CFWL_WidgetImpProperties& properties,
                              IFWL_Widget* pOuter)
     : CFWL_WidgetImp(properties, pOuter),
       m_hTimer(nullptr),
       m_dwElapse(400),
       m_bSetColor(FALSE) {
   m_pTimer = new CFWL_CaretTimer(this);
   SetStates(FWL_STATE_CAT_HightLight);
 }
+
 CFWL_CaretImp::~CFWL_CaretImp() {
-  if (m_pTimer) {
-    delete m_pTimer;
-    m_pTimer = NULL;
-  }
+  delete m_pTimer;
 }
+
 FWL_ERR CFWL_CaretImp::GetClassName(CFX_WideString& wsClass) const {
   wsClass = FWL_CLASS_Caret;
   return FWL_ERR_Succeeded;
 }
 uint32_t CFWL_CaretImp::GetClassID() const {
   return FWL_CLASSHASH_Caret;
 }
 FWL_ERR CFWL_CaretImp::Initialize() {
   if (CFWL_WidgetImp::Initialize() != FWL_ERR_Succeeded)
     return FWL_ERR_Indefinite;
@@ skipping 85 matching lines @@
 }
 CFWL_CaretImpDelegate::CFWL_CaretImpDelegate(CFWL_CaretImp* pOwner)
     : m_pOwner(pOwner) {}
 int32_t CFWL_CaretImpDelegate::OnProcessMessage(CFWL_Message* pMessage) {
   return 1;
 }
 FWL_ERR CFWL_CaretImpDelegate::OnDrawWidget(CFX_Graphics* pGraphics,
                                             const CFX_Matrix* pMatrix) {
   return m_pOwner->DrawWidget(pGraphics, pMatrix);
 }