Properly ref-count CFGAS_GEFont with CFX_RetainPtr.

xfa/fde/tto/fde_textout.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/fde/tto/fde_textout.h"
 
 #include <algorithm>
 
@@ skipping 28 matching lines @@
       m_iTotalLines(0) {
   m_Matrix.SetIdentity();
   m_rtClip.Reset();
   m_rtLogicClip.Reset();
 }
 
 CFDE_TextOut::~CFDE_TextOut() {
   m_ttoLines.RemoveAll(false);
 }
 
-void CFDE_TextOut::SetFont(CFGAS_GEFont* pFont) {
+void CFDE_TextOut::SetFont(const CFX_RetainPtr<CFGAS_GEFont>& pFont) {
   ASSERT(pFont);
   m_pFont = pFont;
   m_pTxtBreak->SetFont(pFont);
 }
 
 void CFDE_TextOut::SetFontSize(FX_FLOAT fFontSize) {
   ASSERT(fFontSize > 0);
   m_fFontSize = fFontSize;
   m_pTxtBreak->SetFontSize(fFontSize);
 }
@@ skipping 882 matching lines @@
   return m_pieces.GetPtrAt(index);
 }
 
 void CFDE_TTOLine::RemoveLast(int32_t iCount) {
   m_pieces.RemoveLast(iCount);
 }
 
 void CFDE_TTOLine::RemoveAll(bool bLeaveMemory) {
   m_pieces.RemoveAll(bLeaveMemory);
 }