seccomp-bpf-helpers: Fix undefined reference

sandbox/linux/BUILD.gn

Index: sandbox/linux/BUILD.gn
diff --git a/sandbox/linux/BUILD.gn b/sandbox/linux/BUILD.gn
index 3070b7347bcc115bb1fc145d2162d9db366a6618..1e6d7a1c813296ff9e7d35ffb60340407a54cec7 100644
--- a/sandbox/linux/BUILD.gn
+++ b/sandbox/linux/BUILD.gn
@@ -41,10 +41,7 @@ group("sandbox") {
     public_deps += [ ":suid_sandbox_client" ]
   }
   if (use_seccomp_bpf || is_nacl_nonsfi) {
-    public_deps += [
-      ":seccomp_bpf",
-      ":seccomp_bpf_helpers",
-    ]
+    public_deps += [ ":seccomp_bpf" ]
   }
 }
 
@@ -221,6 +218,14 @@ component("seccomp_bpf") {
     "bpf_dsl/syscall_set.cc",
     "bpf_dsl/syscall_set.h",
     "bpf_dsl/trap_registry.h",
+    "seccomp-bpf-helpers/baseline_policy.cc",
+    "seccomp-bpf-helpers/baseline_policy.h",
+    "seccomp-bpf-helpers/sigsys_handlers.cc",
+    "seccomp-bpf-helpers/sigsys_handlers.h",
+    "seccomp-bpf-helpers/syscall_parameters_restrictions.cc",
+    "seccomp-bpf-helpers/syscall_parameters_restrictions.h",
+    "seccomp-bpf-helpers/syscall_sets.cc",
+    "seccomp-bpf-helpers/syscall_sets.h",
     "seccomp-bpf/die.cc",
     "seccomp-bpf/die.h",
     "seccomp-bpf/sandbox_bpf.cc",
@@ -250,31 +255,6 @@ component("seccomp_bpf") {
       "bpf_dsl/linux_syscall_ranges.h",
       "bpf_dsl/seccomp_macros.h",
       "bpf_dsl/trap_registry.h",
-    ]
-  }
-}
-
-component("seccomp_bpf_helpers") {
-  sources = [
-    "seccomp-bpf-helpers/baseline_policy.cc",
-    "seccomp-bpf-helpers/baseline_policy.h",
-    "seccomp-bpf-helpers/sigsys_handlers.cc",
-    "seccomp-bpf-helpers/sigsys_handlers.h",
-    "seccomp-bpf-helpers/syscall_parameters_restrictions.cc",
-    "seccomp-bpf-helpers/syscall_parameters_restrictions.h",
-    "seccomp-bpf-helpers/syscall_sets.cc",
-    "seccomp-bpf-helpers/syscall_sets.h",
-  ]
-  defines = [ "SANDBOX_IMPLEMENTATION" ]
-
-  deps = [
-    ":sandbox_services",
-    ":seccomp_bpf",
-    "//base",
-  ]
-
-  if (is_nacl_nonsfi) {
-    sources -= [
       "seccomp-bpf-helpers/baseline_policy.cc",
       "seccomp-bpf-helpers/baseline_policy.h",
       "seccomp-bpf-helpers/syscall_sets.cc",