Standardize usage of virtual/override/final specifiers.

content/browser/child_process_security_policy_browsertest.cc

Index: content/browser/child_process_security_policy_browsertest.cc
diff --git a/content/browser/child_process_security_policy_browsertest.cc b/content/browser/child_process_security_policy_browsertest.cc
index 67d36e4eabf399ffa2047c60b0f194845443f4e8..b509a494706db75d00ce067384b33c51a0435780 100644
--- a/content/browser/child_process_security_policy_browsertest.cc
+++ b/content/browser/child_process_security_policy_browsertest.cc
@@ -20,14 +20,14 @@ namespace content {
 class ChildProcessSecurityPolicyInProcessBrowserTest
     : public ContentBrowserTest {
  public:
-  virtual void SetUp() {
+  void SetUp() override {
     EXPECT_EQ(
       ChildProcessSecurityPolicyImpl::GetInstance()->security_state_.size(),
           0U);
     ContentBrowserTest::SetUp();
   }
 
-  virtual void TearDown() {
+  void TearDown() override {
     EXPECT_EQ(
       ChildProcessSecurityPolicyImpl::GetInstance()->security_state_.size(),
           0U);