sandbox/linux: move ErrorCode into bpf_dsl

sandbox/linux/bpf_dsl/test_trap_registry.cc

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "sandbox/linux/bpf_dsl/test_trap_registry.h"
+
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace sandbox {
+namespace bpf_dsl {
+
+TestTrapRegistry::TestTrapRegistry() : map_() {}
+TestTrapRegistry::~TestTrapRegistry() {}
+
+uint16_t TestTrapRegistry::Add(TrapFnc fnc, const void* aux, bool safe) {
+  EXPECT_TRUE(safe);
+
+  const uint16_t next_id = map_.size() + 1;
+  return map_.insert(std::make_pair(Key(fnc, aux), next_id)).first->second;
+}
+
+bool TestTrapRegistry::EnableUnsafeTraps() {
+  ADD_FAILURE() << "Unimplemented";
+  return false;
+}
+
+}  // namespace bpf_dsl
+}  // namespace sandbox