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

chrome/browser/policy/device_management_service_configuration.h

Index: chrome/browser/policy/device_management_service_configuration.h
diff --git a/chrome/browser/policy/device_management_service_configuration.h b/chrome/browser/policy/device_management_service_configuration.h
index 1d1e3aa0a3bd08d8782cc427d121529ebd6f2f97..98cb681802d9fd14ccf8539c67d1c6b3c1dc3093 100644
--- a/chrome/browser/policy/device_management_service_configuration.h
+++ b/chrome/browser/policy/device_management_service_configuration.h
@@ -19,11 +19,11 @@ class DeviceManagementServiceConfiguration
     : public DeviceManagementService::Configuration {
  public:
   explicit DeviceManagementServiceConfiguration(const std::string& server_url);
-  virtual ~DeviceManagementServiceConfiguration();
+  ~DeviceManagementServiceConfiguration() override;
 
-  virtual std::string GetServerUrl() override;
-  virtual std::string GetAgentParameter() override;
-  virtual std::string GetPlatformParameter() override;
+  std::string GetServerUrl() override;
+  std::string GetAgentParameter() override;
+  std::string GetPlatformParameter() override;
 
  private:
   const std::string server_url_;