Add CPDF_Array::IsEmpty().

core/fpdfapi/fpdf_page/fpdf_page_doc.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/fpdfapi/fpdf_page/pageint.h"
 
 #include <algorithm>
 #include <set>
@@ skipping 257 matching lines @@
         break;
     }
     if (!pDefaultCS)
       return pCS;
 
     pdfium::ScopedSetInsertion<CPDF_Object*> insertion(pVisited, pCSObj);
     return GetColorSpaceImpl(pDefaultCS, nullptr, pVisited);
   }
 
   CPDF_Array* pArray = pCSObj->AsArray();
-  if (!pArray || pArray->GetCount() == 0)
+  if (!pArray || pArray->IsEmpty())
     return nullptr;
 
   if (pArray->GetCount() == 1) {
     pdfium::ScopedSetInsertion<CPDF_Object*> insertion(pVisited, pCSObj);
     return GetColorSpaceImpl(pArray->GetDirectObjectAt(0), pResources,
                              pVisited);
   }
 
   CPDF_CountedColorSpace* csData = nullptr;
   auto it = m_ColorSpaceMap.find(pCSObj);
@@ skipping 249 matching lines @@
 }
 
 CPDF_CountedPattern* CPDF_DocPageData::FindPatternPtr(
     CPDF_Object* pPatternObj) const {
   if (!pPatternObj)
     return nullptr;
 
   auto it = m_PatternMap.find(pPatternObj);
   return it != m_PatternMap.end() ? it->second : nullptr;
 }