Update from https://crrev.com/328418

sandbox/linux/bpf_dsl/codegen.cc

Index: sandbox/linux/bpf_dsl/codegen.cc
diff --git a/sandbox/linux/bpf_dsl/codegen.cc b/sandbox/linux/bpf_dsl/codegen.cc
index 99b78ed3198c9960d998167f6f9e3e6664422113..bc2c7a29464233de9668cb2a606124c415b88830 100644
--- a/sandbox/linux/bpf_dsl/codegen.cc
+++ b/sandbox/linux/bpf_dsl/codegen.cc
@@ -131,7 +131,8 @@ CodeGen::Node CodeGen::Append(uint16_t code, uint32_t k, size_t jt, size_t jf) {
   CHECK_EQ(program_.size(), equivalent_.size());
 
   Node res = program_.size();
-  program_.push_back(sock_filter{code, jt, jf, k});
+  program_.push_back(sock_filter{
+      code, static_cast<uint8_t>(jt), static_cast<uint8_t>(jf), k});
   equivalent_.push_back(res);
   return res;
 }