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

chrome/browser/extensions/api/media_galleries_private/media_galleries_watch_apitest.cc

Index: chrome/browser/extensions/api/media_galleries_private/media_galleries_watch_apitest.cc
diff --git a/chrome/browser/extensions/api/media_galleries_private/media_galleries_watch_apitest.cc b/chrome/browser/extensions/api/media_galleries_private/media_galleries_watch_apitest.cc
index 554a5b44f6640f4f8623f14189aebbe420c02799..e5817e87574ee5016b7b2c1e024bb161e04a09e6 100644
--- a/chrome/browser/extensions/api/media_galleries_private/media_galleries_watch_apitest.cc
+++ b/chrome/browser/extensions/api/media_galleries_private/media_galleries_watch_apitest.cc
@@ -79,13 +79,13 @@ class MediaGalleriesPrivateGalleryWatchApiTest : public ExtensionApiTest {
 
  protected:
   // ExtensionApiTest overrides.
-  virtual void SetUpCommandLine(CommandLine* command_line) override {
+  void SetUpCommandLine(CommandLine* command_line) override {
     ExtensionApiTest::SetUpCommandLine(command_line);
     command_line->AppendSwitchASCII(
         extensions::switches::kWhitelistedExtensionID,
         kTestExtensionId);
   }
-  virtual void SetUpOnMainThread() override {
+  void SetUpOnMainThread() override {
     ExtensionApiTest::SetUpOnMainThread();
     ensure_media_directories_exists_.reset(new EnsureMediaDirectoriesExists);
     extension_ = LoadExtension(test_data_dir_.AppendASCII(kTestExtensionPath));
@@ -93,7 +93,7 @@ class MediaGalleriesPrivateGalleryWatchApiTest : public ExtensionApiTest {
     CreateTestGallery();
     FetchMediaGalleriesList();
   }
-  virtual void TearDownOnMainThread() override {
+  void TearDownOnMainThread() override {
     extension_ = NULL;
     background_host_ = NULL;
     ensure_media_directories_exists_.reset();