Adding an experimental flag to block autoplay with sound in cross-origin iframes

chrome/browser/about_flags.cc

Index: chrome/browser/about_flags.cc
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index bebdc7bf6ef5e6e4ec3d38228c96e4b2b796266c..07d728b7d28fbfc4b389aa0b643385f64ed46a2f 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -1955,10 +1955,10 @@ const FeatureEntry kFeatureEntries[] = {
     {"important-sites-in-cbd", IDS_FLAGS_IMPORTANT_SITES_IN_CBD_NAME,
      IDS_FLAGS_IMPORTANT_SITES_IN_CBD_DESCRIPTION, kOsAndroid,
      FEATURE_VALUE_TYPE(chrome::android::kImportantSitesInCBD)},
+#endif  // OS_ANDROID
     {"autoplay-muted-videos", IDS_FLAGS_ENABLE_AUTOPLAY_MUTED_VIDEOS_NAME,
-     IDS_FLAGS_ENABLE_AUTOPLAY_MUTED_VIDEOS_DESCRIPTION, kOsAndroid,
+     IDS_FLAGS_ENABLE_AUTOPLAY_MUTED_VIDEOS_DESCRIPTION, kOsAll,
      FEATURE_VALUE_TYPE(features::kAutoplayMutedVideos)},
-#endif  // OS_ANDROID
     {"enable-pointer-events", IDS_FLAGS_EXPERIMENTAL_POINTER_EVENT_NAME,
      IDS_FLAGS_EXPERIMENTAL_POINTER_EVENT_DESCRIPTION, kOsAll,
      FEATURE_VALUE_TYPE(features::kPointerEvents)},
@@ -2105,6 +2105,14 @@ const FeatureEntry kFeatureEntries[] = {
      FEATURE_VALUE_TYPE(
          offline_pages::kOfflinePagesSvelteConcurrentLoadingFeature)},
 #endif
+#if !defined(OS_ANDROID)
+    {"media-playback-in-cross-origin-iframes-requires-user-gesture",
+     IDS_FLAGS_MEDIA_PLAYBACK_IN_CROSS_ORIGIN_IFRAMES_REQUIRES_USER_GESTURE_NAME,
+     IDS_FLAGS_MEDIA_PLAYBACK_IN_CROSS_ORIGIN_IFRAMES_REQUIRES_USER_GESTURE_DESCRIPTION,
+     kOsDesktop,
+     FEATURE_VALUE_TYPE(
+         features::kUserGestureRequiredForMediaPlaybackInCrossOriginIframes)},
+#endif
     // NOTE: Adding new command-line switches requires adding corresponding
     // entries to enum "LoginCustomFlags" in histograms.xml. See note in
     // histograms.xml and don't forget to run AboutFlagsHistogramTest unit test.