[DevTools] Explicitly require ResourceTreeModel

third_party/WebKit/Source/devtools/front_end/sdk/CSSStyleSheetHeader.js

 // Copyright 2016 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.
 
 /**
  * @constructor
  * @implements {WebInspector.ContentProvider}
  * @param {!WebInspector.CSSModel} cssModel
  * @param {!CSSAgent.CSSStyleSheetHeader} payload
  */
@@ skipping 59 matching lines @@
     resourceURL: function()
     {
         return this.isViaInspector() ? this._viaInspectorResourceURL() : this.sourceURL;
     },
 
     /**
      * @return {string}
      */
     _viaInspectorResourceURL: function()
     {
-        var frame = this._cssModel.target().resourceTreeModel.frameForId(this.frameId);
-        console.assert(frame);
-        var parsedURL = new WebInspector.ParsedURL(frame.url);
+        var doc = this._cssModel.domModel().existingDocument();

[pfeldman, 2016/08/11 00:34:17]

Depending on the iframe, these will be different documents.

[eostroukhov-old, 2016/08/17 01:09:02]

Rewrote, assuming RTModel is always there.

+        if (!doc)
+            return "";
+        var parsedURL = new WebInspector.ParsedURL(doc.documentURL);
         var fakeURL = "inspector://" + parsedURL.host + parsedURL.folderPathComponents;
         if (!fakeURL.endsWith("/"))
             fakeURL += "/";
         fakeURL += "inspector-stylesheet";
         return fakeURL;
     },
 
     /**
      * @param {number} lineNumberInStyleSheet
      * @return {number}
@@ skipping 119 matching lines @@
          */
         function performSearch(content)
         {
             var searchResults = content ? WebInspector.ContentProvider.performSearchInContent(content, query, caseSensitive, isRegex) : [];
             callback(searchResults);
         }
 
         this.requestContent().then(performSearch);
     }
 }