Get VS 2015 to use const int definitions

third_party/protobuf/src/google/protobuf/compiler/plugin.pb.cc

Index: third_party/protobuf/src/google/protobuf/compiler/plugin.pb.cc
diff --git a/third_party/protobuf/src/google/protobuf/compiler/plugin.pb.cc b/third_party/protobuf/src/google/protobuf/compiler/plugin.pb.cc
index 32c8f08a5e55707b6c2a55a0bd373cd4edbe6445..d8dbfd9b458ee0ae6ba053f3510043cdd2339823 100644
--- a/third_party/protobuf/src/google/protobuf/compiler/plugin.pb.cc
+++ b/third_party/protobuf/src/google/protobuf/compiler/plugin.pb.cc
@@ -162,11 +162,11 @@ struct StaticDescriptorInitializer_google_2fprotobuf_2fcompiler_2fplugin_2eproto
 
 // ===================================================================
 
-#ifndef _MSC_VER
+#if !defined(_MSC_VER) || _MSC_VER >= 1900
 const int CodeGeneratorRequest::kFileToGenerateFieldNumber;
 const int CodeGeneratorRequest::kParameterFieldNumber;
 const int CodeGeneratorRequest::kProtoFileFieldNumber;
-#endif  // !_MSC_VER
+#endif  // !defined(_MSC_VER) || _MSC_VER >= 1900
 
 CodeGeneratorRequest::CodeGeneratorRequest()
   : ::google::protobuf::Message() {
@@ -479,11 +479,11 @@ void CodeGeneratorRequest::Swap(CodeGeneratorRequest* other) {
 
 // ===================================================================
 
-#ifndef _MSC_VER
+#if !defined(_MSC_VER) || _MSC_VER >= 1900
 const int CodeGeneratorResponse_File::kNameFieldNumber;
 const int CodeGeneratorResponse_File::kInsertionPointFieldNumber;
 const int CodeGeneratorResponse_File::kContentFieldNumber;
-#endif  // !_MSC_VER
+#endif  // !defined(_MSC_VER) || _MSC_VER >= 1900
 
 CodeGeneratorResponse_File::CodeGeneratorResponse_File()
   : ::google::protobuf::Message() {
@@ -818,10 +818,10 @@ void CodeGeneratorResponse_File::Swap(CodeGeneratorResponse_File* other) {
 
 // -------------------------------------------------------------------
 
-#ifndef _MSC_VER
+#if !defined(_MSC_VER) || _MSC_VER >= 1900
 const int CodeGeneratorResponse::kErrorFieldNumber;
 const int CodeGeneratorResponse::kFileFieldNumber;
-#endif  // !_MSC_VER
+#endif  // !defined(_MSC_VER) || _MSC_VER >= 1900
 
 CodeGeneratorResponse::CodeGeneratorResponse()
   : ::google::protobuf::Message() {