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

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

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import <Cocoa/Cocoa.h>
 
 #import "base/mac/scoped_nsobject.h"
 #import "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/infobars/infobar_service.h"
@@ skipping 39 matching lines @@
             "en",
             "es",
             error,
             false) {}
 
   MOCK_METHOD0(Translate, void());
   MOCK_METHOD0(RevertTranslation, void());
 
   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());
 };
 
 }  // namespace
 
 class TranslationInfoBarTest : public CocoaProfileTest {
  public:
   TranslationInfoBarTest() : CocoaProfileTest(), infobar_(NULL) {
   }
 
@@ skipping 189 matching lines @@
   translate_prefs->ResetTranslationDeniedCount("en");
   for (int i = 0; i < 4; ++i) {
     translate_prefs->IncrementTranslationDeniedCount("en");
   }
   CreateInfoBar(translate::TRANSLATE_STEP_BEFORE_TRANSLATE);
   BeforeTranslateInfobarController* controller =
       (BeforeTranslateInfobarController*)infobar_controller_.get();
   EXPECT_TRUE([[controller alwaysTranslateButton] superview] == nil);
   EXPECT_TRUE([[controller neverTranslateButton] superview] != nil);
 }