Update {virtual,override} to follow C++11 style in chrome.

chrome/browser/ui/cocoa/infobars/translate_infobar_unittest.mm

Index: chrome/browser/ui/cocoa/infobars/translate_infobar_unittest.mm
diff --git a/chrome/browser/ui/cocoa/infobars/translate_infobar_unittest.mm b/chrome/browser/ui/cocoa/infobars/translate_infobar_unittest.mm
index 04f4fe8cfa16a1891c1d9df2e0f7c82d5fe0e257..d16e8067bc66340cdaafc19349997dd756242a25 100644
--- a/chrome/browser/ui/cocoa/infobars/translate_infobar_unittest.mm
+++ b/chrome/browser/ui/cocoa/infobars/translate_infobar_unittest.mm
@@ -57,11 +57,11 @@ class MockTranslateInfoBarDelegate
 
   MOCK_METHOD0(TranslationDeclined, void());
 
-  virtual bool IsTranslatableLanguageByPrefs() override { return true; }
+  bool IsTranslatableLanguageByPrefs() override { return true; }
   MOCK_METHOD0(ToggleTranslatableLanguageByPrefs, void());
-  virtual bool IsSiteBlacklisted() override { return false; }
+  bool IsSiteBlacklisted() override { return false; }
   MOCK_METHOD0(ToggleSiteBlacklist, void());
-  virtual bool ShouldAlwaysTranslate() override { return false; }
+  bool ShouldAlwaysTranslate() override { return false; }
   MOCK_METHOD0(ToggleAlwaysTranslate, void());
 };