Standardize usage of virtual/override/final in chrome/

chrome/test/chromedriver/chrome/navigation_tracker_unittest.cc

Index: chrome/test/chromedriver/chrome/navigation_tracker_unittest.cc
diff --git a/chrome/test/chromedriver/chrome/navigation_tracker_unittest.cc b/chrome/test/chromedriver/chrome/navigation_tracker_unittest.cc
index ae35e2578685c794783de36e07c32858a0cca012..bc013deb09227dc3c583576ec6de1298362ad695 100644
--- a/chrome/test/chromedriver/chrome/navigation_tracker_unittest.cc
+++ b/chrome/test/chromedriver/chrome/navigation_tracker_unittest.cc
@@ -259,9 +259,9 @@ class FailToEvalScriptDevToolsClient : public StubDevToolsClient {
  public:
   FailToEvalScriptDevToolsClient() : is_dom_getDocument_requested_(false) {}
 
-  virtual ~FailToEvalScriptDevToolsClient() {}
+  ~FailToEvalScriptDevToolsClient() override {}
 
-  virtual Status SendCommandAndGetResult(
+  Status SendCommandAndGetResult(
       const std::string& method,
       const base::DictionaryValue& params,
       scoped_ptr<base::DictionaryValue>* result) override {
@@ -305,9 +305,9 @@ class DeterminingLoadStateDevToolsClient : public StubDevToolsClient {
         send_event_first_(send_event_first),
         send_event_first_params_(send_event_first_params) {}
 
-  virtual ~DeterminingLoadStateDevToolsClient() {}
+  ~DeterminingLoadStateDevToolsClient() override {}
 
-  virtual Status SendCommandAndGetResult(
+  Status SendCommandAndGetResult(
       const std::string& method,
       const base::DictionaryValue& params,
       scoped_ptr<base::DictionaryValue>* result) override {