Standardize usage of virtual/override/final in chrome/browser/extensions/

chrome/browser/extensions/api/networking_private/networking_private_service_client_apitest.cc

Index: chrome/browser/extensions/api/networking_private/networking_private_service_client_apitest.cc
diff --git a/chrome/browser/extensions/api/networking_private/networking_private_service_client_apitest.cc b/chrome/browser/extensions/api/networking_private/networking_private_service_client_apitest.cc
index 7310d490ca367e7156abb6760526325c220f021e..607734337eb4660f495526c49eef7c0e29116275 100644
--- a/chrome/browser/extensions/api/networking_private/networking_private_service_client_apitest.cc
+++ b/chrome/browser/extensions/api/networking_private/networking_private_service_client_apitest.cc
@@ -36,23 +36,23 @@ namespace {
 // networking_private_apitest.
 class CryptoVerifyStub
     : public extensions::NetworkingPrivateServiceClient::CryptoVerify {
-  virtual void VerifyDestination(const Credentials& verification_properties,
-                                 bool* verified,
-                                 std::string* error) override {
+  void VerifyDestination(const Credentials& verification_properties,
+                         bool* verified,
+                         std::string* error) override {
     *verified = true;
   }
 
-  virtual void VerifyAndEncryptCredentials(
+  void VerifyAndEncryptCredentials(
       const std::string& network_guid,
       const Credentials& credentials,
       const VerifyAndEncryptCredentialsCallback& callback) override {
     callback.Run("encrypted_credentials", "");
   }
 
-  virtual void VerifyAndEncryptData(const Credentials& verification_properties,
-                                    const std::string& data,
-                                    std::string* base64_encoded_ciphertext,
-                                    std::string* error) override {
+  void VerifyAndEncryptData(const Credentials& verification_properties,
+                            const std::string& data,
+                            std::string* base64_encoded_ciphertext,
+                            std::string* error) override {
     *base64_encoded_ciphertext = "encrypted_data";
   }
 };
@@ -67,11 +67,11 @@ class NetworkingPrivateServiceClientApiTest : public ExtensionApiTest {
                                kFlagEnableFileAccess | kFlagLoadAsComponent);
   }
 
-  virtual void SetUpInProcessBrowserTestFixture() override {
+  void SetUpInProcessBrowserTestFixture() override {
     ExtensionApiTest::SetUpInProcessBrowserTestFixture();
   }
 
-  virtual void SetUpCommandLine(CommandLine* command_line) override {
+  void SetUpCommandLine(CommandLine* command_line) override {
     ExtensionApiTest::SetUpCommandLine(command_line);
     // Whitelist the extension ID of the test extension.
     command_line->AppendSwitchASCII(
@@ -85,7 +85,7 @@ class NetworkingPrivateServiceClientApiTest : public ExtensionApiTest {
                                               new CryptoVerifyStub());
   }
 
-  virtual void SetUpOnMainThread() override {
+  void SetUpOnMainThread() override {
     ExtensionApiTest::SetUpOnMainThread();
     content::RunAllPendingInMessageLoop();
     NetworkingPrivateServiceClientFactory::GetInstance()->SetTestingFactory(