Delete the logPrivate APIs

chrome/renderer/resources/extensions/log_private_custom_bindings.js

-// Copyright 2014 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.
-
-// Custom binding for the logPrivate API.
-var binding = require('binding').Binding.create('logPrivate');
-
-var getFileBindingsForApi =
-    require('fileEntryBindingUtil').getFileBindingsForApi;
-var fileBindings = getFileBindingsForApi('logPrivate');
-var bindFileEntryCallback = fileBindings.bindFileEntryCallback;
-
-binding.registerCustomHook(function(bindingsAPI) {
-  var apiFunctions = bindingsAPI.apiFunctions;
-
-  $Array.forEach(['dumpLogs'],
-                  function(functionName) {
-    bindFileEntryCallback(functionName, apiFunctions);
-  });
-
-});
-
-exports.$set('bindFileEntryCallback', bindFileEntryCallback);
-exports.$set('binding', binding.generate());