DevTools: Fix focus handling in debug mode.

Source/devtools/front_end/ui/UIUtils.js

Index: Source/devtools/front_end/ui/UIUtils.js
diff --git a/Source/devtools/front_end/ui/UIUtils.js b/Source/devtools/front_end/ui/UIUtils.js
index 9cd3db0da0672c15c2d057ab35f53d4b00c3e2bc..4d721b4d2904358422dc9dad6cfc1b04882634b0 100644
--- a/Source/devtools/front_end/ui/UIUtils.js
+++ b/Source/devtools/front_end/ui/UIUtils.js
@@ -1071,17 +1071,10 @@ WebInspector.LongClickController.prototype = {
     __proto__: WebInspector.Object.prototype
 }
 
-;(function() {
-
-function windowLoaded()
+WebInspector.initializeUIUtils = function()
 {
     window.addEventListener("focus", WebInspector._windowFocused, false);
     window.addEventListener("blur", WebInspector._windowBlurred, false);
     document.addEventListener("focus", WebInspector._focusChanged, true);
     document.addEventListener("blur", WebInspector._documentBlurred, true);
-    window.removeEventListener("DOMContentLoaded", windowLoaded, false);
 }
-
-window.addEventListener("DOMContentLoaded", windowLoaded, false);
-
-})();