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

chrome/browser/extensions/api/content_settings/content_settings_apitest.cc

Index: chrome/browser/extensions/api/content_settings/content_settings_apitest.cc
diff --git a/chrome/browser/extensions/api/content_settings/content_settings_apitest.cc b/chrome/browser/extensions/api/content_settings/content_settings_apitest.cc
index fe33840001b2e747d622b9f75f6ce816fbf3b524..f457a3a74993f7a69e2e6d76f6980dd119fbb5ab 100644
--- a/chrome/browser/extensions/api/content_settings/content_settings_apitest.cc
+++ b/chrome/browser/extensions/api/content_settings/content_settings_apitest.cc
@@ -35,12 +35,12 @@ class ExtensionContentSettingsApiTest : public ExtensionApiTest {
  public:
   ExtensionContentSettingsApiTest() : profile_(NULL) {}
 
-  virtual void SetUpCommandLine(CommandLine* command_line) override {
+  void SetUpCommandLine(CommandLine* command_line) override {
     ExtensionApiTest::SetUpCommandLine(command_line);
     command_line->AppendSwitch(switches::kDisablePluginsDiscovery);
   }
 
-  virtual void SetUpOnMainThread() override {
+  void SetUpOnMainThread() override {
     ExtensionApiTest::SetUpOnMainThread();
 
     // The browser might get closed later (and therefore be destroyed), so we
@@ -53,7 +53,7 @@ class ExtensionContentSettingsApiTest : public ExtensionApiTest {
     g_browser_process->AddRefModule();
   }
 
-  virtual void TearDownOnMainThread() override {
+  void TearDownOnMainThread() override {
     // ReleaseBrowserProcessModule() needs to be called in a message loop, so we
     // post a task to do it, then run the message loop.
     base::MessageLoop::current()->PostTask(