Remove the user counter for border-image elements with no border style

third_party/WebKit/Source/core/frame/Deprecation.cpp

 // Copyright 2016 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 "core/frame/Deprecation.h"
 
 #include "core/dom/Document.h"
 #include "core/dom/ExecutionContext.h"
 #include "core/frame/FrameConsole.h"
 #include "core/frame/FrameHost.h"
@@ skipping 334 matching lines @@
 
     case UseCounter::V8TouchEvent_InitTouchEvent_Method:
         return replacedWillBeRemoved("'TouchEvent.initTouchEvent'", "the TouchEvent constructor", 53, "5730982598541312");
 
     case UseCounter::ObjectObserve:
         return willBeRemoved("'Object.observe'", 50, "6147094632988672");
 
     case UseCounter::SVGZoomEvent:
         return willBeRemoved("'SVGZoomEvent'", 52, "5760883808534528");
 
-    case UseCounter::BorderImageWithBorderStyleNone:
-        return "Elements using the 'border-image' CSS property with no 'border-style' set should have no border, but currently do. Setting 'border-style' will be required in M51, around May 2016. See https://www.chromestatus.com/features/5542503914668032 for more details.";
-
     case UseCounter::WebAnimationHyphenatedProperty:
         return "Hyphenated property names in Web Animations keyframes are invalid and therefore ignored. Please use camelCase instead.";
 
     case UseCounter::PresentationConnectionStateChangeEventListener:
         return replacedWillBeRemoved("'PresentationConnection.onstateachange'", "'PresentationConnection.on{connect,close,terminate}'", 51, "5662456714100736");
 
     case UseCounter::HTMLKeygenElement:
         return willBeRemoved("The <keygen> element", 54, "5716060992962560");
 
     case UseCounter::ResultsAttribute:
         return willBeRemoved("'results' attribute", 53, "5738199536107520");
 
     case UseCounter::TouchDragUserGestureUsedCrossOrigin:
         return willBeRemoved("Performing sensitive operations in iframes on touch events which don't represent a tap gesture", 52, "https://www.chromestatus.com/features/5649871251963904");
 
     // Features that aren't deprecated don't have a deprecation message.
     default:
         return String();
     }
 }
 
 } // namespace blink