Use smart pointers for class owned pointers

xfa/fwl/basewidget/fwl_caretimp.h

Index: xfa/fwl/basewidget/fwl_caretimp.h
diff --git a/xfa/fwl/basewidget/fwl_caretimp.h b/xfa/fwl/basewidget/fwl_caretimp.h
index 4f16715cd1cb513338dfea126daba499c35535a7..d8b621b43c28fb35b9c1cdf35bb7a1468faa68dc 100644
--- a/xfa/fwl/basewidget/fwl_caretimp.h
+++ b/xfa/fwl/basewidget/fwl_caretimp.h
@@ -7,6 +7,8 @@
 #ifndef XFA_FWL_BASEWIDGET_FWL_CARETIMP_H_
 #define XFA_FWL_BASEWIDGET_FWL_CARETIMP_H_
 
+#include <memory>
+
 #include "xfa/fwl/core/fwl_widgetimp.h"
 #include "xfa/fwl/core/ifwl_timer.h"
 #include "xfa/fwl/core/ifwl_widget.h"
@@ -51,8 +53,8 @@ class CFWL_CaretImp : public CFWL_WidgetImp {
                    IFWL_ThemeProvider* pTheme,
                    const CFX_Matrix* pMatrix);
 
-  CFWL_CaretTimer* m_pTimer;
-  IFWL_TimerInfo* m_pTimerInfo;
+  std::unique_ptr<CFWL_CaretTimer> m_pTimer;
+  IFWL_TimerInfo* m_pTimerInfo;  // not owned.
   uint32_t m_dwElapse;
   CFX_Color m_crFill;
   FX_BOOL m_bSetColor;