Selection API: addRange() should be ignored if there is an existing Range.

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 400 matching lines @@
       return willBeRemoved("FileReaderSync in service workers", M59,
                            "5739144722513920");
 
     case UseCounter::CSSZoomReset:
       return willBeRemoved("\"zoom: reset\"", M59, "4997605029314560");
 
     case UseCounter::CSSZoomDocument:
       return willBeRemoved("\"zoom: document\"", M59, "4997605029314560");
 
     case UseCounter::SelectionAddRangeIntersect:
-      return willBeRemoved(
-          "The behavior that Selection.addRange() merges existing Range and "
-          "the specified Range",
-          M58, "6680566019653632");
+      return "The behavior that Selection.addRange() merges existing Range and "
+             "the specified Range was removed. See "
+             "https://www.chromestatus.com/features/6680566019653632 for more "
+             "details.";
 
     // Features that aren't deprecated don't have a deprecation message.
     default:
       return String();
   }
 }
 
 }  // namespace blink