Make CFX_ByteString(const CFX_ByteStringC&) explicit.

fpdfsdk/pdfwindow/PWL_Caret.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 "fpdfsdk/pdfwindow/PWL_Caret.h"
 
 #include "core/fxge/include/fx_ge.h"
 #include "fpdfsdk/pdfwindow/PWL_Utils.h"
@@ skipping 77 matching lines @@
     sCaret << rcRect.left + m_fWidth / 2 << " " << rcRect.top << " l S\nQ\n";
 
     sAppStream << sCaret;
   }
 }
 
 CFX_ByteString CPWL_Caret::GetCaretAppearanceStream(
     const CFX_FloatPoint& ptOffset) {
   CFX_ByteTextBuf sCaret;
   GetCaretApp(sCaret, ptOffset);
-  return sCaret.AsStringC();
+  return sCaret.MakeString();
 }
 
 void CPWL_Caret::TimerProc() {
   if (m_nDelay > 0) {
     m_nDelay--;
   } else {
     m_bFlash = !m_bFlash;
     InvalidateRect();
   }
 }
@@ skipping 44 matching lines @@
   if (pRect) {
     CFX_FloatRect rcRefresh = CPWL_Utils::InflateRect(*pRect, 0.5f);
     rcRefresh.top += 1;
     rcRefresh.bottom -= 1;
 
     CPWL_Wnd::InvalidateRect(&rcRefresh);
   } else {
     CPWL_Wnd::InvalidateRect(pRect);
   }
 }