INPUT element: Remove case-insensitive matching for radio button group names.

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 229 matching lines @@
              "standard 'requestAnimationFrame' instead.";
 
     case UseCounter::PrefixedCancelAnimationFrame:
       return "'webkitCancelAnimationFrame' is vendor-specific. Please use the "
              "standard 'cancelAnimationFrame' instead.";
 
     case UseCounter::PictureSourceSrc:
       return "<source src> with a <picture> parent is invalid and therefore "
              "ignored. Please use <source srcset> instead.";
 
-    case UseCounter::RadioNameMatchingASCIICaseless:
-    case UseCounter::RadioNameMatchingCaseFolding:
-      return willBeRemoved(
-          "Case-insensitive matching for <input type=radio name=...>", M57,
-          "6165799291060224");
-
     case UseCounter::ConsoleTimeline:
       return replacedBy("'console.timeline'", "'console.time'");
 
     case UseCounter::ConsoleTimelineEnd:
       return replacedBy("'console.timelineEnd'", "'console.timeEnd'");
 
     case UseCounter::XMLHttpRequestSynchronousInNonWorkerOutsideBeforeUnload:
       return "Synchronous XMLHttpRequest on the main thread is deprecated "
              "because of its detrimental effects to the end user's experience. "
              "For more help, check https://xhr.spec.whatwg.org/.";
@@ skipping 149 matching lines @@
           "redirected response. This will result in an error in %s.",
           milestoneString(M59));
 
     // Features that aren't deprecated don't have a deprecation message.
     default:
       return String();
   }
 }
 
 }  // namespace blink