Wake up other streams/task runners after removing ended stream

chromecast/media/cma/base/balanced_media_task_runner_factory.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chromecast/media/cma/base/balanced_media_task_runner_factory.h"
 
 #include <map>
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
@@ skipping 226 matching lines @@
   base::TimeDelta min_timestamp(runnable_task_runner.begin()->first);
   base::TimeDelta max_timestamp = min_timestamp + max_delta_;
   for (TaskRunnerMap::iterator it = runnable_task_runner.begin();
        it != runnable_task_runner.end(); ++it) {
     (*it).second->ScheduleWork(max_timestamp);
   }
 }
 
 void BalancedMediaTaskRunnerFactory::UnregisterMediaTaskRunner(
       const scoped_refptr<BalancedMediaTaskRunner>& media_task_runner) {
-  base::AutoLock auto_lock(lock_);
-  task_runners_.erase(media_task_runner);
+  {
+    base::AutoLock auto_lock(lock_);
+    task_runners_.erase(media_task_runner);
+  }
+  // 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
 }  // namespace chromecast