x11: Add a missing break statement from r283931.

ui/events/x/events_x.cc

 // Copyright (c) 2012 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 "ui/events/event_constants.h"
 
 #include <cmath>
 #include <string.h>
 #include <X11/extensions/XInput.h>
 #include <X11/extensions/XInput2.h>
@@ skipping 583 matching lines @@
         case XI_KeyRelease:
           // Build an XKeyEvent corresponding to the XI2 event,
           // so that we can call XLookupString on it.
           InitXKeyEventFromXIDeviceEvent(*native_event, &xkey_from_xi2);
           xkey = &xkey_from_xi2.xkey;
           break;
         default:
           NOTREACHED();
           break;
       }
+      break;
     }
     default:
       NOTREACHED();
       break;
   }
   KeySym keysym = XK_VoidSymbol;
   if (xkey)
     XLookupString(xkey, NULL, 0, &keysym, NULL);
   return keysym;
 }
@@ skipping 189 matching lines @@
   DeviceDataManagerX11::GetInstance()->GetGestureTimes(
       native_event, start_time, end_time);
   return true;
 }
 
 bool IsTouchpadEvent(const base::NativeEvent& event) {
   return DeviceDataManagerX11::GetInstance()->IsTouchpadXInputEvent(event);
 }
 
 }  // namespace ui