DevTools: Set inactive class if devtools starts without focus

third_party/WebKit/Source/devtools/front_end/ui/UIUtils.js

 /*
  * Copyright (C) 2011 Google Inc.  All rights reserved.
  * Copyright (C) 2006, 2007, 2008 Apple Inc.  All rights reserved.
  * Copyright (C) 2007 Matt Lilek (pewtermoose@gmail.com).
  * Copyright (C) 2009 Joseph Pecoraro
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
@@ skipping 1092 matching lines @@
     this._element.addEventListener('click', this._longClickData.reset, true);
     delete this._longClickData;
   }
 };
 
 /**
  * @param {!Document} document
  * @param {!Common.Setting} themeSetting
  */
 UI.initializeUIUtils = function(document, themeSetting) {
+  document.body.classList.toggle('inactive', !document.hasFocus());
   document.defaultView.addEventListener('focus', UI._windowFocused.bind(UI, document), false);
   document.defaultView.addEventListener('blur', UI._windowBlurred.bind(UI, document), false);
   document.addEventListener('focus', UI._focusChanged.bind(UI), true);
   document.addEventListener('keydown', event => {
     UI._keyboardFocus = true;
     document.defaultView.requestAnimationFrame(() => UI._keyboardFocus = false);
   }, true);
 
   if (!UI.themeSupport)
     UI.themeSupport = new UI.ThemeSupport(themeSetting);
@@ skipping 883 matching lines @@
    */
   constructor(message, okCallback, cancelCallback) {
     super(true);
     this.registerRequiredCSS('ui/confirmDialog.css');
     this.contentElement.createChild('div', 'message').createChild('span').textContent = message;
     var buttonsBar = this.contentElement.createChild('div', 'button');
     buttonsBar.appendChild(UI.createTextButton(Common.UIString('Ok'), okCallback));
     buttonsBar.appendChild(UI.createTextButton(Common.UIString('Cancel'), cancelCallback));
   }
 };