Stop converting widestring -> c_str -> widestring in several places.

fpdfsdk/cpdfsdk_widget.cpp

 // Copyright 2016 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/include/cpdfsdk_widget.h"
 
 #include <memory>
 
@@ skipping 1373 matching lines @@
   else
     pEdit->SetFontSize(fFontSize);
 
   pEdit->Initialize();
 
   if (sValue) {
     pEdit->SetText(*sValue);
   } else {
     int32_t nCurSel = pField->GetSelectedIndex(0);
     if (nCurSel < 0)
-      pEdit->SetText(pField->GetValue().c_str());
+      pEdit->SetText(pField->GetValue());
     else
-      pEdit->SetText(pField->GetOptionLabel(nCurSel).c_str());
+      pEdit->SetText(pField->GetOptionLabel(nCurSel));
   }
 
   CFX_FloatRect rcContent = pEdit->GetContentRect();
 
   CFX_ByteString sEdit =
       CPWL_Utils::GetEditAppStream(pEdit.get(), CFX_FloatPoint(0.0f, 0.0f));
   if (sEdit.GetLength() > 0) {
     sBody << "/Tx BMC\n"
           << "q\n";
     if (rcContent.Width() > rcEdit.Width() ||
@@ skipping 48 matching lines @@
 
   for (int32_t i = nTop; i < nCount; ++i) {
     bool bSelected = false;
     for (int32_t j = 0; j < nSelCount; ++j) {
       if (pField->GetSelectedIndex(j) == i) {
         bSelected = true;
         break;
       }
     }
 
-    pEdit->SetText(pField->GetOptionLabel(i).c_str());
+    pEdit->SetText(pField->GetOptionLabel(i));
 
     CFX_FloatRect rcContent = pEdit->GetContentRect();
     FX_FLOAT fItemHeight = rcContent.Height();
 
     if (bSelected) {
       CFX_FloatRect rcItem =
           CFX_FloatRect(rcClient.left, fy - fItemHeight, rcClient.right, fy);
       sList << "q\n"
             << CPWL_Utils::GetColorAppStream(
                    CPWL_Color(COLORTYPE_RGB, 0, 51.0f / 255.0f,
@@ skipping 95 matching lines @@
       pEdit->SetLimitChar(nMaxLen);
     }
   }
 
   if (IsFloatZero(fFontSize))
     pEdit->SetAutoFontSize(TRUE, TRUE);
   else
     pEdit->SetFontSize(fFontSize);
 
   pEdit->Initialize();
-
-  if (sValue)
-    pEdit->SetText(*sValue);
-  else
-    pEdit->SetText(pField->GetValue().c_str());
+  pEdit->SetText(sValue ? *sValue : pField->GetValue());
 
   CFX_FloatRect rcContent = pEdit->GetContentRect();
-
   CFX_ByteString sEdit = CPWL_Utils::GetEditAppStream(
       pEdit.get(), CFX_FloatPoint(0.0f, 0.0f), nullptr, !bCharArray, subWord);
 
   if (sEdit.GetLength() > 0) {
     sBody << "/Tx BMC\n"
           << "q\n";
     if (rcContent.Width() > rcClient.Width() ||
         rcContent.Height() > rcClient.Height()) {
       sBody << rcClient.left << " " << rcClient.bottom << " "
             << rcClient.Width() << " " << rcClient.Height() << " re\nW\nn\n";
@@ skipping 346 matching lines @@
     return FALSE;
 
   if (!IsVisible())
     return FALSE;
 
   if ((GetFieldFlags() & FIELDFLAG_READONLY) == FIELDFLAG_READONLY)
     return FALSE;
 
   return TRUE;
 }