function removeOriginForFrame(frame)
        {
            for (var i = 0; i < frame.childFrames.length; ++i)
                removeOriginForFrame.call(this, frame.childFrames[i]);
            if (!frame.isMainFrame())
                this._removeSecurityOrigin(frame.securityOrigin);
        }
@param {!WebInspector.ResourceTreeFrame} frame
@this {WebInspector.ResourceTreeModel}