Create autoplay policy flag and merge cross-origin autoplay blocking into it.

media/base/media_switches.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.
 
 // Defines all the "media" command-line switches.
 
 #ifndef MEDIA_BASE_MEDIA_SWITCHES_H_
 #define MEDIA_BASE_MEDIA_SWITCHES_H_
 
 #include "base/feature_list.h"
 #include "build/build_config.h"
 #include "media/base/media_export.h"
 #include "media/media_features.h"
 #include "ppapi/features/features.h"
 
 namespace switches {
 
 MEDIA_EXPORT extern const char kAudioBufferSize[];
 
+MEDIA_EXPORT extern const char kAutoplayPolicy[];
+
 MEDIA_EXPORT extern const char kVideoThreads[];
 
 MEDIA_EXPORT extern const char kEnableMediaSuspend[];
 MEDIA_EXPORT extern const char kDisableMediaSuspend[];
 
 MEDIA_EXPORT extern const char kReportVp9AsAnUnsupportedMimeType[];
 
 MEDIA_EXPORT extern const char kEnableNewVp9CodecString[];
 
 #if defined(OS_LINUX) || defined(OS_FREEBSD) || defined(OS_SOLARIS)
@@ skipping 38 matching lines @@
 
 MEDIA_EXPORT extern const char kDisableRTCSmoothnessAlgorithm[];
 
 MEDIA_EXPORT extern const char kEnableVp9InMp4[];
 
 MEDIA_EXPORT extern const char kForceVideoOverlays[];
 
 MEDIA_EXPORT extern const char kMSEAudioBufferSizeLimit[];
 MEDIA_EXPORT extern const char kMSEVideoBufferSizeLimit[];
 
+namespace autoplay {
+
+MEDIA_EXPORT extern const char kCrossOriginUserGestureRequiredPolicy[];
+MEDIA_EXPORT extern const char kNoUserGestureRequiredPolicy[];
+MEDIA_EXPORT extern const char kUserGestureRequiredPolicy[];
+
+}  // namespace autoplay
+
 }  // namespace switches
 
 namespace media {
 
 // All features in alphabetical order. The features should be documented
 // alongside the definition of their values in the .cc file.
 
-#if defined(OS_WIN)
-MEDIA_EXPORT extern const base::Feature kD3D11VideoDecoding;
-MEDIA_EXPORT extern const base::Feature kMediaFoundationH264Encoding;
-#endif  // defined(OS_WIN)
-
+MEDIA_EXPORT extern const base::Feature kAutoplayPolicy;
 MEDIA_EXPORT extern const base::Feature kNewAudioRenderingMixingStrategy;
 MEDIA_EXPORT extern const base::Feature kOverlayFullscreenVideo;
 MEDIA_EXPORT extern const base::Feature kResumeBackgroundVideo;
 MEDIA_EXPORT extern const base::Feature kUseNewMediaCache;
 MEDIA_EXPORT extern const base::Feature kVideoColorManagement;
 MEDIA_EXPORT extern const base::Feature kVideoBlitColorAccuracy;
 MEDIA_EXPORT extern const base::Feature kExternalClearKeyForTesting;
 MEDIA_EXPORT extern const base::Feature kBackgroundVideoTrackOptimization;
 MEDIA_EXPORT extern const base::Feature kBackgroundVideoPauseOptimization;
 MEDIA_EXPORT extern const base::Feature kMemoryPressureBasedSourceBufferGC;
 
 #if defined(OS_ANDROID)
 MEDIA_EXPORT extern const base::Feature kAndroidMediaPlayerRenderer;
 MEDIA_EXPORT extern const base::Feature kVideoFullscreenOrientationLock;
 MEDIA_EXPORT extern const base::Feature kMediaDrmPersistentLicense;
 #endif  // defined(OS_ANDROID)
+
+#if defined(OS_WIN)
+MEDIA_EXPORT extern const base::Feature kD3D11VideoDecoding;
+MEDIA_EXPORT extern const base::Feature kMediaFoundationH264Encoding;
+#endif  // defined(OS_WIN)
+
 }  // namespace media
 
 #endif  // MEDIA_BASE_MEDIA_SWITCHES_H_