[DevTools] Make resource tree model optional

third_party/WebKit/Source/devtools/front_end/extensions/ExtensionServer.js

 /*
  * 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 480 matching lines @@
          * @this {WebInspector.ExtensionServer}
          */
         function pushResourceData(contentProvider)
         {
             if (!resources.has(contentProvider.contentURL()))
                 resources.set(contentProvider.contentURL(), this._makeResource(contentProvider));
         }
         var uiSourceCodes = WebInspector.workspace.uiSourceCodesForProjectType(WebInspector.projectTypes.Network);
         uiSourceCodes = uiSourceCodes.concat(WebInspector.workspace.uiSourceCodesForProjectType(WebInspector.projectTypes.ContentScripts));
         uiSourceCodes.forEach(pushResourceData.bind(this));
-        for (var target of WebInspector.targetManager.targets())
-            target.resourceTreeModel.forAllResources(pushResourceData.bind(this));
+        for (var target of WebInspector.targetManager.targets(WebInspector.Target.Capability.DOM))
+            WebInspector.ResourceTreeModel.fromTarget(target).forAllResources(pushResourceData.bind(this));
         return resources.valuesArray();
     },
 
     /**
      * @param {!WebInspector.ContentProvider} contentProvider
      * @param {!Object} message
      * @param {!MessagePort} port
      */
     _getResourceContent: function(contentProvider, message, port)
     {
@@ skipping 423 matching lines @@
             function hasMatchingURL(frame)
             {
                 found = (frame.url === url) ? frame : null;
                 return found;
             }
             WebInspector.ResourceTreeModel.frames().some(hasMatchingURL);
             return found;
         }
 
         if (typeof options === "object") {
-            var frame = options.frameURL ? resolveURLToFrame(options.frameURL) : WebInspector.targetManager.mainTarget().resourceTreeModel.mainFrame;
+            var frame;
+            if (options.frameURL) {
+                frame = resolveURLToFrame(options.frameURL);
+            } else {
+                var target = WebInspector.targetManager.mainTarget();
+                var resourceTreeModel = target && WebInspector.ResourceTreeModel.fromTarget(target);
+                frame = resourceTreeModel && resourceTreeModel.mainFrame;
+            }
             if (!frame) {
                 if (options.frameURL)
                     console.warn("evaluate: there is no frame with URL " + options.frameURL);
                 else
                     console.warn("evaluate: the main frame is not yet available");
                 return this._status.E_NOTFOUND(options.frameURL || "<top>");
             }
 
             var contextSecurityOrigin;
             if (options.useContentScriptContext)
@@ skipping 128 matching lines @@
 /**
  * @typedef {{code: string, description: string, details: !Array.<*>}}
  */
 WebInspector.ExtensionStatus.Record;
 
 WebInspector.extensionAPI = {};
 defineCommonExtensionSymbols(WebInspector.extensionAPI);
 
 /** @type {!WebInspector.ExtensionServer} */
 WebInspector.extensionServer;