Flush all TaskScheduler<->MainLoop tasks in ~TestBrowserThreadBundle()

content/public/test/test_utils.h

 // Copyright (c) 2012 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.
 
 #ifndef CONTENT_PUBLIC_TEST_TEST_UTILS_H_
 #define CONTENT_PUBLIC_TEST_TEST_UTILS_H_
 
 #include <memory>
 
 #include "base/callback.h"
@@ skipping 38 matching lines @@
 // then resets nestable tasks to what they were originally. Prefer this
 // over MessageLoop::RunAllPending for in process browser tests to run
 // all pending tasks. Can only be called from the UI thread.
 void RunAllPendingInMessageLoop();
 
 // Blocks the current thread until all the pending messages in the loop of the
 // thread |thread_id| have been processed. Can only be called from the UI
 // thread.
 void RunAllPendingInMessageLoop(BrowserThread::ID thread_id);
 
-// Runs until both the blocking pool and the current message loop are empty
-// (have no more scheduled tasks) and no tasks are running.
+// Runs until the blocking pool, task scheduler, and the current message loop
+// are all empty (have no more scheduled tasks) and no tasks are running.
 //
 // TODO(fdoray): Rename to RunAllTaskSchedulerTasksUntilIdle() once the blocking
 // pool is fully deprecated. https://crbug.com/667892
 void RunAllBlockingPoolTasksUntilIdle();
 
 // Get task to quit the given RunLoop. It allows a few generations of pending
 // tasks to run as opposed to run_loop->QuitClosure().
 base::Closure GetDeferredQuitTaskForRunLoop(base::RunLoop* run_loop);
 
 // Executes the specified JavaScript in the specified frame, and runs a nested
@@ skipping 236 matching lines @@
   void WebContentsDestroyed() override;
 
   base::RunLoop run_loop_;
 
   DISALLOW_COPY_AND_ASSIGN(WebContentsDestroyedWatcher);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_TEST_TEST_UTILS_H_