Re-enable MSVC warning 4800 for compiling with chromium_code

core/src/fpdfapi/fpdf_parser/cpdf_syntax_parser.cpp

Index: core/src/fpdfapi/fpdf_parser/cpdf_syntax_parser.cpp
diff --git a/core/src/fpdfapi/fpdf_parser/cpdf_syntax_parser.cpp b/core/src/fpdfapi/fpdf_parser/cpdf_syntax_parser.cpp
index b414827f95eb84c2e7e38c105e26c1ff52d2276e..89ad5eec33dbc5330e3eb9c02b71f0d6cc07c4bf 100644
--- a/core/src/fpdfapi/fpdf_parser/cpdf_syntax_parser.cpp
+++ b/core/src/fpdfapi/fpdf_parser/cpdf_syntax_parser.cpp
@@ -772,7 +772,8 @@ CPDF_Stream* CPDF_SyntaxParser::ReadStream(CPDF_Dictionary* pDict,
   GetNextWordInternal(nullptr);
 
   int numMarkers = ReadEOLMarkers(m_Pos);
-  if (m_WordSize == kEndObjStr.GetLength() && numMarkers != 0 &&
+  if (m_WordSize == static_cast<unsigned int>(kEndObjStr.GetLength()) &&
+      numMarkers != 0 &&
       FXSYS_memcmp(m_WordBuffer, kEndObjStr.GetPtr(), kEndObjStr.GetLength()) ==
           0) {
     m_Pos = streamStartPos;