Re-enable MSVC warning 4800 for compiling with chromium_code

core/src/fpdfapi/fpdf_parser/cpdf_hint_tables.cpp

Index: core/src/fpdfapi/fpdf_parser/cpdf_hint_tables.cpp
diff --git a/core/src/fpdfapi/fpdf_parser/cpdf_hint_tables.cpp b/core/src/fpdfapi/fpdf_parser/cpdf_hint_tables.cpp
index 6256f4c526b273f0b0e543e97a4a4e657bd67ab1..84464fcff2ddceda7a9f84a000eb06d7ff11f16c 100644
--- a/core/src/fpdfapi/fpdf_parser/cpdf_hint_tables.cpp
+++ b/core/src/fpdfapi/fpdf_parser/cpdf_hint_tables.cpp
@@ -267,7 +267,7 @@ FX_BOOL CPDF_HintTables::ReadSharedObjHintTable(CFX_BitStream* hStream,
   if (!CanReadFromBitStream(hStream, required_bits))
     return FALSE;
 
-  for (int i = 0; i < dwSharedObjTotal; ++i) {
+  for (FX_DWORD i = 0; i < dwSharedObjTotal; ++i) {
     dwPrevObjLen = dwCurObjLen;
     FX_SAFE_DWORD safeObjLen = hStream->GetBits(dwDeltaGroupLen);
     safeObjLen += dwGroupLeastLen;