Wake up other streams/task runners after removing ended stream

chromecast/media/cma/base/balanced_media_task_runner_factory.cc

Index: chromecast/media/cma/base/balanced_media_task_runner_factory.cc
diff --git a/chromecast/media/cma/base/balanced_media_task_runner_factory.cc b/chromecast/media/cma/base/balanced_media_task_runner_factory.cc
index f365534e457e0375302bc83eef001e47c70c289e..2c12ef0e4ac9086b4ca8a0b74e1b1082d62e1bcb 100644
--- a/chromecast/media/cma/base/balanced_media_task_runner_factory.cc
+++ b/chromecast/media/cma/base/balanced_media_task_runner_factory.cc
@@ -246,6 +246,10 @@ void BalancedMediaTaskRunnerFactory::UnregisterMediaTaskRunner(
       const scoped_refptr<BalancedMediaTaskRunner>& media_task_runner) {
   base::AutoLock auto_lock(lock_);
   task_runners_.erase(media_task_runner);

[damienv1, 2015/05/13 22:23:11]

Note: the lock should not be applied on OnNewTask:

{
  base::AutoLock auto_lock(lock_);
  task_runners_.erase(media_task_runner);
}
OnNewTask();

[servolk, 2015/05/13 22:25:45]

Done.

+  // After removing one of the task runners some of the other task runners might
+  // need to be waken up, if they are no longer blocked by the balancing
+  // restrictions with the old stream.
+  OnNewTask();
 }
 
 }  // namespace media