Update from https://crrev.com/306655

sandbox/linux/seccomp-bpf/errorcode.h

Index: sandbox/linux/seccomp-bpf/errorcode.h
diff --git a/sandbox/linux/seccomp-bpf/errorcode.h b/sandbox/linux/seccomp-bpf/errorcode.h
index fb86fe802881004772c7e6ef7ddb574fb311eb18..d88777313e3ef10abe6bc5b55689f097810ffdcf 100644
--- a/sandbox/linux/seccomp-bpf/errorcode.h
+++ b/sandbox/linux/seccomp-bpf/errorcode.h
@@ -21,6 +21,10 @@ class PolicyCompiler;
 // All of the commonly used values are stored in the "err_" field. So, code
 // that is using the ErrorCode class typically operates on a single 32bit
 // field.
+//
+// TODO(mdempsky): Nuke from orbit. The only reason this class still
+// exists is for Verifier, which will eventually be replaced by a true
+// BPF symbolic evaluator and constraint solver.
 class SANDBOX_EXPORT ErrorCode {
  public:
   enum {