DevTools: Get rid of synchronous XHRs in the frontend code

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 43 matching lines @@
 {
     return "\n/*# sourceURL=" + WebInspector.ParsedURL.completeURL(window.location.href, cssFile) + " */";
 }
 
 /**
  * @param {string} cssFile
  * @return {!Element}
  */
 WebInspector.View.createStyleElement = function(cssFile)
 {
-    var content = Runtime.cachedResources[cssFile];
-    if (!content) {
-        if (Runtime.isReleaseMode())
-            console.error(cssFile + " not preloaded, loading from the remote. Check module.json");
-        content = loadResource(cssFile) + WebInspector.View._buildSourceURL(cssFile);
-        Runtime.cachedResources[cssFile] = content;
-    }
+    var content = Runtime.cachedResources[cssFile] || "";
+    if (!content)
+        console.error(cssFile + " not preloaded. Check module.json");
     var styleElement = createElement("style");
     styleElement.type = "text/css";
     styleElement.textContent = content;
     return styleElement;
 }
 
 WebInspector.View.prototype = {
     markAsRoot: function()
     {
         WebInspector.installComponentRootStyles(this.element);
@@ skipping 575 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);
 }