Standardize usage of virtual/override/final specifiers.

content/browser/service_worker/service_worker_job_unittest.cc

Index: content/browser/service_worker/service_worker_job_unittest.cc
diff --git a/content/browser/service_worker/service_worker_job_unittest.cc b/content/browser/service_worker/service_worker_job_unittest.cc
index 91d986f9e689072911a11e7bffc09d0234bc198b..91ad2263292d59ed1ee46083e7bedb3a8cc5195d 100644
--- a/content/browser/service_worker/service_worker_job_unittest.cc
+++ b/content/browser/service_worker/service_worker_job_unittest.cc
@@ -102,13 +102,11 @@ class ServiceWorkerJobTest : public testing::Test {
       : browser_thread_bundle_(TestBrowserThreadBundle::IO_MAINLOOP),
         render_process_id_(kMockRenderProcessId) {}
 
-  virtual void SetUp() override {
+  void SetUp() override {
     helper_.reset(new EmbeddedWorkerTestHelper(render_process_id_));
   }
 
-  virtual void TearDown() override {
-    helper_.reset();
-  }
+  void TearDown() override { helper_.reset(); }
 
   ServiceWorkerContextCore* context() const { return helper_->context(); }