Bug 1511132 - Disable ServiceWindowClients.openWindow() under GeckoView r=asuth

This also disables test_openWindow.html when running in GeckoView.

Differential Revision: https://phabricator.services.mozilla.com/D14556

--HG--
extra : moz-landing-system : lando

dom/clients/manager/ClientOpenWindowUtils.cpp

@@ -363,6 +363,13 @@ RefPtr<ClientOpPromise> ClientOpenWindowInCurrentProcess(
       new ClientOpPromise::Private(__func__);
 
 #ifdef MOZ_WIDGET_ANDROID
+  // This isn't currently available on GeckoView because we have no way of
+  // knowing which app to launch. Bug 1511033.
+  if (!jni::IsFennec()) {
+    promise->Reject(NS_ERROR_NOT_IMPLEMENTED, __func__);
+    return promise.forget();
+  }
+
   // This fires an intent that will start launching Fennec and foreground it,
   // if necessary.  We create an observer so that we can determine when
   // the launch has completed.

dom/serviceworkers/test/mochitest.ini

@@ -282,6 +282,7 @@ tags = mcb
 [test_onmessageerror.html]
 [test_opaque_intercept.html]
 [test_openWindow.html]
+skip-if = toolkit == 'android' && !isFennec
 tags = openwindow
 [test_origin_after_redirect.html]
 [test_origin_after_redirect_cached.html]