DevTools: remove deleted registrations from the SW list if a newer version is available.

third_party/WebKit/Source/devtools/front_end/sdk/ServiceWorkerManager.js

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 491 matching lines @@
     return true;
   }
 
   /**
    * @return {boolean}
    */
   _shouldBeRemoved() {
     return this._isRedundant() && (!this.errors.length || this._deleting);
   }
 
+  /**
+   * @return {boolean}
+   */
+  canBeRemoved() {
+    return this.isDeleted || this._deleting;
+  }
+
+
   clearErrors() {
     this._fingerprint = Symbol('fingerprint');
     this.errors = [];
   }
 };
 
 /**
  * @unrestricted
  */
 SDK.ServiceWorkerContextNamer = class {
@@ skipping 74 matching lines @@
    */
   _updateContextLabel(context, version) {
     var parsedUrl = context.origin.asParsedURL();
     var label = parsedUrl ? parsedUrl.lastPathComponentWithFragment() : context.name;
     if (version)
       context.setLabel(label + ' #' + version.id + ' (' + version.status + ')');
     else
       context.setLabel(label);
   }
 };