Fold IFWL*::{Initialize|Finalize} into constructor/destructor

xfa/fwl/core/cfwl_checkbox.cpp

Index: xfa/fwl/core/cfwl_checkbox.cpp
diff --git a/xfa/fwl/core/cfwl_checkbox.cpp b/xfa/fwl/core/cfwl_checkbox.cpp
index 3a26c8ed87b16fbf71715dd1d9a2d850c827d392..4fbb04891d85c25c712851dc7e8048266189c466 100644
--- a/xfa/fwl/core/cfwl_checkbox.cpp
+++ b/xfa/fwl/core/cfwl_checkbox.cpp
@@ -8,6 +8,7 @@
 
 #include <memory>
 
+#include "third_party/base/ptr_util.h"
 #include "xfa/fwl/core/fwl_error.h"
 
 namespace {
@@ -25,11 +26,9 @@ CFWL_CheckBox::~CFWL_CheckBox() {}
 void CFWL_CheckBox::Initialize() {
   ASSERT(!m_pIface);
 
-  std::unique_ptr<IFWL_CheckBox> pCheckBox(new IFWL_CheckBox(
-      m_pApp, m_pProperties->MakeWidgetImpProperties(&m_checkboxData)));
-  pCheckBox->Initialize();
+  m_pIface = pdfium::MakeUnique<IFWL_CheckBox>(
+      m_pApp, m_pProperties->MakeWidgetImpProperties(&m_checkboxData));
 
-  m_pIface = std::move(pCheckBox);
   CFWL_Widget::Initialize();
 }