Revert "Prevent chrome://net-internals/#export from flickering"

chrome/browser/resources/net_internals/main.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.
 
 /**
  * Dictionary of constants (Initialized soon after loading by data from browser,
  * updated on load log).  The *Types dictionaries map strings to numeric IDs,
  * while the *TypeNames are the other way around.
  */
 var EventType = null;
@@ skipping 185 matching lines @@
       addTab(QuicView);
       addTab(SdchView);
       addTab(HttpCacheView);
       addTab(ModulesView);
       addTab(TestView);
       addTab(HSTSView);
       addTab(BandwidthView);
       addTab(PrerenderView);
       addTab(CrosView);
 
-      // To prevent flickering, main-tab-contents initially has display = none.
-      $('main-tab-contents').style.display = '';
       this.tabSwitcher_.showMenuItem(CrosView.TAB_ID, cr.isChromeOS);
     },
 
     /**
      * This function is called by the tab switcher when the current tab has been
      * changed. It will update the current URL to reflect the new active tab,
      * so the back can be used to return to previous view.
      */
     onTabSwitched_: function(oldTabId, newTabId) {
       // Update data needed by newly active tab, as it may be
@@ skipping 176 matching lines @@
  * Returns the name for sdchProblemCode.
  *
  * Example: sdchProblemCodeToString(5) should return
  * "DECODE_BODY_ERROR".
  * @param {number} sdchProblemCode The SDCH problem code.
  * @return {string} The name of the given problem code.
  */
 function sdchProblemCodeToString(sdchProblemCode) {
   return getKeyWithValue(SdchProblemCode, sdchProblemCode);
 }