Properly ref-count CFGAS_GEFont with CFX_RetainPtr.

xfa/fwl/cfwl_barcode.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/cfwl_barcode.h"
 
 #include <utility>
 
@@ skipping 151 matching lines @@
 
   m_dwStatus = 0;
   CreateBarcodeEngine();
   if (!m_pBarcodeEngine)
     return;
 
   IFWL_ThemeProvider* pTheme = GetAvailableTheme();
   if (pTheme) {
     CFWL_ThemePart part;
     part.m_pWidget = this;
-
-    if (CFGAS_GEFont* pFont = pTheme->GetFont(&part)) {
+    if (CFX_RetainPtr<CFGAS_GEFont> pFont = pTheme->GetFont(&part)) {
       if (CFX_Font* pCXFont = pFont->GetDevFont())
         m_pBarcodeEngine->SetFont(pCXFont);
     }
     m_pBarcodeEngine->SetFontSize(pTheme->GetFontSize(&part));
     m_pBarcodeEngine->SetFontColor(pTheme->GetTextColor(&part));
   } else {
     m_pBarcodeEngine->SetFontSize(FWLTHEME_CAPACITY_FontSize);
   }
 
   m_pBarcodeEngine->SetHeight(int32_t(GetRTClient().height));
@@ skipping 32 matching lines @@
 }
 
 void CFWL_Barcode::CreateBarcodeEngine() {
   if (m_pBarcodeEngine || m_type == BC_UNKNOWN)
     return;
 
   std::unique_ptr<CFX_Barcode> pBarcode(new CFX_Barcode);
   if (pBarcode->Create(m_type))
     m_pBarcodeEngine = std::move(pBarcode);
 }