DevTools: introduce WI.UISourceCode.requestMetadata()

third_party/WebKit/Source/devtools/front_end/bindings/ContentProviderBasedProject.js

 /*
  * Copyright (C) 2013 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 41 matching lines @@
      * @param {function(?string)} callback
      */
     requestFileContent: function(uiSourceCode, callback)
     {
         var contentProvider = this._contentProviders[uiSourceCode.url()];
         contentProvider.requestContent().then(callback);
     },
 
     /**
      * @override
+     * @param {!WebInspector.UISourceCode} uiSourceCode
+     * @return {!Promise<?WebInspector.UISourceCodeMetadata>}
+     */
+    requestMetadata: function(uiSourceCode)
+    {
+        return Promise.resolve(/** @type {?WebInspector.UISourceCodeMetadata} */(null));
+    },
+
+    /**
+     * @override
      * @return {boolean}
      */
     canSetFileContent: function()
     {
         return false;
     },
 
     /**
      * @override
      * @param {!WebInspector.UISourceCode} uiSourceCode
@@ skipping 229 matching lines @@
     },
 
     dispose: function()
     {
         this._contentProviders = {};
         this.removeProject();
     },
 
     __proto__: WebInspector.ProjectStore.prototype
 }