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

media/base/media_switches.cc

 // 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.
 
 #include "build/build_config.h"
 #include "media/base/media_switches.h"
 #include "ppapi/features/features.h"
 
 namespace switches {
 
@@ skipping 120 matching lines @@
 const char kEnableVp9InMp4[] = "enable-vp9-in-mp4";
 
 // Force media player using SurfaceView instead of SurfaceTexture on Android.
 const char kForceVideoOverlays[] = "force-video-overlays";
 
 // Allows explicitly specifying MSE audio/video buffer sizes.
 // Default values are 150M for video and 12M for audio.
 const char kMSEAudioBufferSizeLimit[] = "mse-audio-buffer-size-limit";
 const char kMSEVideoBufferSizeLimit[] = "mse-video-buffer-size-limit";
 
+// Ignores all autoplay restrictions. It will ignore the current autoplay policy
+// and all restrictions such as playback in a background tab. It should only be
+// enabled for testing.
+const char kIgnoreAutoplayRestrictionsForTests[] =
+    "ignore-autoplay-restrictions";
+
 namespace autoplay {
 
 // Autoplay policy to require a user gesture in ordor to play for cross origin
 // iframes.
 const char kCrossOriginUserGestureRequiredPolicy[] =
     "cross-origin-user-gesture-required";
 
 // Autoplay policy that does not require any user gesture.
 const char kNoUserGestureRequiredPolicy[] = "no-user-gesture-required";
 
@@ skipping 75 matching lines @@
 // This is completely insecure - DO NOT USE except for testing.
 const base::Feature kD3D11VideoDecoding{"D3D11VideoDecoding",
                                         base::FEATURE_DISABLED_BY_DEFAULT};
 
 // Enables H264 HW encode acceleration using Media Foundation for Windows.
 const base::Feature kMediaFoundationH264Encoding{
     "MediaFoundationH264Encoding", base::FEATURE_ENABLED_BY_DEFAULT};
 #endif  // defined(OS_WIN)
 
 }  // namespace media