Add CPDF_Array::IsEmpty().

core/fpdfdoc/cpdf_formfield.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 "core/fpdfdoc/include/cpdf_formfield.h"
 
 #include "core/fpdfapi/fpdf_parser/include/cfdf_document.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_array.h"
@@ skipping 869 matching lines @@
       }
       pArray->InsertAt(i, new CPDF_Number(iOptIndex));
       bReturn = TRUE;
       break;
     }
   }
   if (!bReturn) {
     if (bSelected)
       pArray->AddInteger(iOptIndex);
 
-    if (pArray->GetCount() == 0)
+    if (pArray->IsEmpty())
       m_pDict->RemoveAt("I");
   }
   if (bNotify)
     NotifyListOrComboBoxAfterChange();
 
   return TRUE;
 }
 
 FX_BOOL CPDF_FormField::ClearSelectedOptions(FX_BOOL bNotify) {
   if (bNotify && m_pForm->m_pFormNotify) {
@@ skipping 87 matching lines @@
     case ListBox:
       NotifyAfterSelectionChange();
       break;
     case ComboBox:
       NotifyAfterValueChange();
       break;
     default:
       break;
   }
 }