Update from chromium https://crrev.com/301315

sandbox/linux/bpf_dsl/bpf_dsl.cc

Index: sandbox/linux/bpf_dsl/bpf_dsl.cc
diff --git a/sandbox/linux/bpf_dsl/bpf_dsl.cc b/sandbox/linux/bpf_dsl/bpf_dsl.cc
index ffabeac6da5464ce27b8fe2cf117296e7ed73b11..ce7c111473bd055cd9e20e18deb99763ea83710d 100644
--- a/sandbox/linux/bpf_dsl/bpf_dsl.cc
+++ b/sandbox/linux/bpf_dsl/bpf_dsl.cc
@@ -4,8 +4,6 @@
 
 #include "sandbox/linux/bpf_dsl/bpf_dsl.h"
 
-#include <errno.h>
-
 #include <limits>
 
 #include "base/logging.h"
@@ -372,15 +370,6 @@ ResultExpr Elser::Else(const ResultExpr& else_result) const {
   return expr;
 }
 
-ResultExpr SandboxBPFDSLPolicy::InvalidSyscall() const {
-  return Error(ENOSYS);
-}
-
-ResultExpr SandboxBPFDSLPolicy::Trap(TrapRegistry::TrapFnc trap_func,
-                                     const void* aux) {
-  return bpf_dsl::Trap(trap_func, aux);
-}
-
 }  // namespace bpf_dsl
 }  // namespace sandbox