As another data point, WebOS has a system/session bus (it uses to be based on dbus, now it's not anymore but the logic is similar anyway).<br><br>To provide web apps access to system functionalities, they apparently pacthed WebKit1<br>
<br><a href="https://github.com/isis-project/WebKit/blob/master/Source/WebCore/platform/webos/LunaServiceMgr.cpp">https://github.com/isis-project/WebKit/blob/master/Source/WebCore/platform/webos/LunaServiceMgr.cpp</a><br>