Add CFDE_TxtEdtBuf tests

xfa/fde/cfde_txtedtengine.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/cfde_txtedtengine.h"
 
 #include <algorithm>
 
@@ skipping 657 matching lines @@
     m_nCaret = nLength;
   }
   int32_t nIndex = m_nCaret;
   if (!m_bBefore) {
     nIndex--;
   }
   m_rtCaret.Set(0, 0, 1, m_Param.fFontSize);
   Unlock();
 }
 
-bool CFDE_TxtEdtEngine::Optimize(IFX_Pause* pPause) {
-  return m_pTxtBuf->Optimize(pPause);
-}
-
 CFDE_TxtEdtBuf* CFDE_TxtEdtEngine::GetTextBuf() const {
   return m_pTxtBuf.get();
 }
 
 int32_t CFDE_TxtEdtEngine::GetTextBufLength() const {
   return m_pTxtBuf->GetTextLength() - 1;
 }
 
 CFX_TxtBreak* CFDE_TxtEdtEngine::GetTextBreak() const {
   return m_pTextBreak.get();
@@ skipping 785 matching lines @@
       m_SelRangePtrArr.RemoveAt(nCountRange);
       DeleteRange_DoRecord(nSelStart, nSelCount, true);
     }
     ClearSelection();
     m_Param.pEventSink->OnTextChanged(m_ChangeInfo);
     m_Param.pEventSink->OnSelChanged();
     SetCaretPos(nSelStart, true);
     return;
   }
 }