Revert of DevTools: Made id unique across different remote browsers

chrome/browser/resources/inspect/inspect.js

 // 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.
 
 var MIN_VERSION_TAB_CLOSE = 25;
 var MIN_VERSION_TARGET_ID = 26;
 var MIN_VERSION_NEW_TAB = 29;
 var MIN_VERSION_TAB_ACTIVATE = 30;
 
 var queryParamsObject = {};
@@ skipping 526 matching lines @@
     screenRect.appendChild(viewRect);
   }
 
   var propertiesBox = row.querySelector('.properties-box');
   propertiesBox.insertBefore(thumbnail, propertiesBox.firstChild);
 }
 
 function addTargetToList(data, list, properties) {
   var row = document.createElement('div');
   row.className = 'row';
-  row.targetId = data.id;
 
   var propertiesBox = document.createElement('div');
   propertiesBox.className = 'properties-box';
   row.appendChild(propertiesBox);
 
   var subrowBox = document.createElement('div');
   subrowBox.className = 'subrow-box';
   propertiesBox.appendChild(subrowBox);
 
   var subrow = document.createElement('div');
@@ skipping 376 matching lines @@
     deviceSection.querySelector('.device-ports').textContent = '';
   }
 
   Array.prototype.forEach.call(
       document.querySelectorAll('.device'), clearPorts);
 }
 
 document.addEventListener('DOMContentLoaded', onload);
 
 window.addEventListener('hashchange', onHashChange);