Bug 1383322 - Allow changing the current MessageLoop (r=dvander)

MozReview-Commit-ID: 1kyHqrhOzjF

ipc/chromium/src/base/message_loop.cc

@@ -168,6 +168,11 @@ MessageLoop* MessageLoop::current() {
   return get_tls_ptr().Get();
 }
 
+// static
+void MessageLoop::set_current(MessageLoop* loop) {
+  get_tls_ptr().Set(loop);
+}
+
 static mozilla::Atomic<int32_t> message_loop_id_seq(0);
 
 MessageLoop::MessageLoop(Type type, nsIThread* aThread)

ipc/chromium/src/base/message_loop.h

@@ -219,6 +219,8 @@ public:
   // Returns the MessageLoop object for the current thread, or null if none.
   static MessageLoop* current();
 
+  static void set_current(MessageLoop* loop);
+
   // Enables or disables the recursive task processing. This happens in the case
   // of recursive message loops. Some unwanted message loop may occurs when
   // using common controls or printer functions. By default, recursive task