Update from https://crrev.com/327068

sandbox/linux/seccomp-bpf/bpf_tester_compatibility_delegate.h

Index: sandbox/linux/seccomp-bpf/bpf_tester_compatibility_delegate.h
diff --git a/sandbox/linux/seccomp-bpf/bpf_tester_compatibility_delegate.h b/sandbox/linux/seccomp-bpf/bpf_tester_compatibility_delegate.h
index 18699138d551258601ad4f571f246e108b4c8803..7736c1506fbf475762b6aa69983c21e833266d3c 100644
--- a/sandbox/linux/seccomp-bpf/bpf_tester_compatibility_delegate.h
+++ b/sandbox/linux/seccomp-bpf/bpf_tester_compatibility_delegate.h
@@ -25,9 +25,9 @@ class BPFTesterCompatibilityDelegate : public BPFTesterDelegate {
   explicit BPFTesterCompatibilityDelegate(TestFunction test_function)
       : aux_(), test_function_(test_function) {}
 
-  virtual ~BPFTesterCompatibilityDelegate() {}
+  ~BPFTesterCompatibilityDelegate() override {}
 
-  virtual scoped_ptr<bpf_dsl::Policy> GetSandboxBPFPolicy() override {
+  scoped_ptr<bpf_dsl::Policy> GetSandboxBPFPolicy() override {
     // The current method is guaranteed to only run in the child process
     // running the test. In this process, the current object is guaranteed
     // to live forever. So it's ok to pass aux_pointer_for_policy_ to
@@ -35,7 +35,7 @@ class BPFTesterCompatibilityDelegate : public BPFTesterDelegate {
     return scoped_ptr<bpf_dsl::Policy>(new Policy(&aux_));
   }
 
-  virtual void RunTestFunction() override {
+  void RunTestFunction() override {
     // Run the actual test.
     // The current object is guaranteed to live forever in the child process
     // where this will run.