Reland of name kDisableGestureRequirementForMediaPlayback and make it a test-only flag.

content/browser/media/session/media_session_impl_visibility_browsertest.cc

 // Copyright 2016 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 <tuple>
 
 #include "base/command_line.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/single_thread_task_runner.h"
@@ skipping 79 matching lines @@
   }
 
   void EnableDisableResumingBackgroundVideos(bool enable) {
     if (enable)
       scoped_feature_list_.InitAndEnableFeature(media::kResumeBackgroundVideo);
     else
       scoped_feature_list_.InitAndDisableFeature(media::kResumeBackgroundVideo);
   }
 
   void SetUpCommandLine(base::CommandLine* command_line) override {
-    command_line->AppendSwitch(
-        switches::kDisableGestureRequirementForMediaPlayback);
+    command_line->AppendSwitch(switches::kIgnoreAutoplayRestrictionsForTests);
 #if !defined(OS_ANDROID)
     command_line->AppendSwitch(switches::kEnableDefaultMediaSession);
 #endif  // !defined(OS_ANDROID)
 
     VisibilityTestData params = GetVisibilityTestData();
 
     if (params.media_suspend == MediaSuspend::ENABLED)
       command_line->AppendSwitch(switches::kEnableMediaSuspend);
     else
       command_line->AppendSwitch(switches::kDisableMediaSuspend);
@@ skipping 159 matching lines @@
   MaybePausePlayer();
   HideTab();
   CheckSessionStateAfterHide();
 }
 
 INSTANTIATE_TEST_CASE_P(MediaSessionImplVisibilityBrowserTestInstances,
                         MediaSessionImplVisibilityBrowserTest,
                         ::testing::ValuesIn(kTestParams));
 
 }  // namespace content