DevTools: Fix content_shell devtools built in debug_devtools=1 mode

Source/devtools/front_end/ui/View.js

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  * Copyright (C) 2011 Google Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 332 matching lines @@
     doLayout: function()
     {
         if (!this.isShowing())
             return;
         this._notify(this.onLayout);
         this.doResize();
     },
 
     registerRequiredCSS: function(cssFile)
     {
-        if (window.flattenImports)
-            cssFile = cssFile.split("/").reverse()[0];
         this._cssFiles.push(cssFile);
     },
 
     _loadCSSIfNeeded: function()
     {
         for (var i = 0; i < this._cssFiles.length; ++i) {
             var cssFile = this._cssFiles[i];
 
             var viewsWithCSSFile = WebInspector.View._cssFileToVisibleViewCount[cssFile];
             WebInspector.View._cssFileToVisibleViewCount[cssFile] = (viewsWithCSSFile || 0) + 1;
@@ skipping 316 matching lines @@
 {
     WebInspector.View._assert(!child.__viewCounter && !child.__view, "Attempt to remove element containing view via regular DOM operation");
     return WebInspector.View._originalRemoveChild.call(this, child);
 }
 
 Element.prototype.removeChildren = function()
 {
     WebInspector.View._assert(!this.__viewCounter, "Attempt to remove element containing view via regular DOM operation");
     WebInspector.View._originalRemoveChildren.call(this);
 }