Reland of Fix leaked internal font

xfa/fgas/font/fgas_stdfontmgr.cpp

 // Copyright 2015 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/fgas/font/fgas_stdfontmgr.h"
 
 #include "core/fxcrt/include/fx_stream.h"
 #include "core/fxge/include/cfx_fontmapper.h"
@@ skipping 829 matching lines @@
     return nullptr;
 
   IFX_SystemFontInfo* pSystemFontInfo = pFontMapper->GetSystemFontInfo();
   if (!pSystemFontInfo)
     return nullptr;
 
   IFX_FileRead* pFontStream = CreateFontStream(wsFaceName.UTF8Encode());
   if (!pFontStream)
     return nullptr;
 
-  CFX_Font* pInternalFont = new CFX_Font();
+  std::unique_ptr<CFX_Font> pInternalFont(new CFX_Font());
   if (!pInternalFont->LoadFile(pFontStream, iFaceIndex)) {
     pFontStream->Release();
     return nullptr;
   }
 
-  CFGAS_GEFont* pFont = CFGAS_GEFont::LoadFont(pInternalFont, this);
+  CFGAS_GEFont* pFont = CFGAS_GEFont::LoadFont(std::move(pInternalFont), this);
   if (!pFont) {
     pFontStream->Release();
     return nullptr;
   }
 
   m_IFXFont2FileRead.SetAt(pFont, pFontStream);
   if (pFaceCount)
     *pFaceCount = pFont->GetDevFont()->GetFace()->num_faces;
 
   return pFont;
@@ skipping 515 matching lines @@
 
 int32_t CFGAS_FontMgrImp::IsPartName(const CFX_WideString& Name1,
                                      const CFX_WideString& Name2) {
   if (Name1.Find(Name2.c_str()) != -1) {
     return 1;
   }
   return 0;
 }
 
 #endif