Switch cases that returns same value should use fall through.

chrome/browser/renderer_context_menu/spelling_menu_observer.cc

 // Copyright 2014 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.
 
 #include "chrome/browser/renderer_context_menu/spelling_menu_observer.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/i18n/case_conversion.h"
 #include "base/prefs/pref_service.h"
@@ skipping 210 matching lines @@
     case IDC_SPELLCHECK_ADD_TO_DICTIONARY:
       return !misspelled_word_.empty();
 
     case IDC_CONTENT_CONTEXT_NO_SPELLING_SUGGESTIONS:
       return false;
 
     case IDC_CONTENT_CONTEXT_SPELLING_SUGGESTION:
       return succeeded_;
 
     case IDC_CONTENT_CONTEXT_SPELLING_TOGGLE:
-      return integrate_spelling_service_.IsUserModifiable() &&
-             !profile->IsOffTheRecord();
-
     case IDC_CONTENT_CONTEXT_AUTOCORRECT_SPELLING_TOGGLE:
       return integrate_spelling_service_.IsUserModifiable() &&
              !profile->IsOffTheRecord();
 
     default:
       return false;
   }
 }
 
 void SpellingMenuObserver::ExecuteCommand(int command_id) {
@@ skipping 159 matching lines @@
   // Append '.' characters to the end of "Checking".
   loading_frame_ = (loading_frame_ + 1) & 3;
   base::string16 loading_message =
       loading_message_ + base::string16(loading_frame_,'.');
 
   // Update the menu item with the text. We disable this item to prevent users
   // from selecting it.
   proxy_->UpdateMenuItem(IDC_CONTENT_CONTEXT_SPELLING_SUGGESTION, false, false,
                          loading_message);
 }