Bug 944136 - Don't show .tab-background while closing a tab r=dao

From 6545b42b606f1dcb81712069722f9d56ecea3d27 Mon Sep 17 00:00:00 2001
Bug 943672 - Convert to Promise.jsm in Scratchpad. r=anton
Bug 943669 - Convert to Promise.jsm in profiler. r=anton
Bug 943673 - Convert to Promise.jsm in the source editor. r=anton
Bug 935232 - Implement a client for the Firefox Accounts auth server. r=markh
Bug 940541 - Convert shader editor to use Promise.jsm. r=vp, r=benvie
Bug 943170 - Fix Android mozglue for raise() to avoid pthread bug. r=glandium
Backed out changeset 4fda28f9e259 (bug 944136)
Bug 944136 - [Australis] Don't show .tab-background while closing a tab r=dao DONTBUILD
Bug 921942 - Broadcast scroll positions
Bug 921942 - Tests