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

content/public/common/content_features.cc

Index: content/public/common/content_features.cc
diff --git a/content/public/common/content_features.cc b/content/public/common/content_features.cc
index 656b8fb78f25e535e8a6834d33a8675d84a6471b..cbda488d61c7a07ed043344977d89982d83e4df4 100644
--- a/content/public/common/content_features.cc
+++ b/content/public/common/content_features.cc
@@ -239,10 +239,6 @@ const base::Feature kSendBeaconThrowForBlobWithNonSimpleType{
     base::FEATURE_DISABLED_BY_DEFAULT};
 
 #if defined(OS_ANDROID)
-// Allow videos to autoplay without a user gesture if muted.
-const base::Feature kAutoplayMutedVideos{"AutoplayMutedVideos",
-                                         base::FEATURE_ENABLED_BY_DEFAULT};
-
 // Use IME's own thread instead of using main UI thread. It also means that
 // we will not use replica editor and do a round trip to renderer to synchronize
 // with Blink data.
@@ -258,6 +254,16 @@ const base::Feature kWebPayments{"WebPayments",
 
 #endif
 
+// Allow videos to autoplay without a user gesture if muted.
+const base::Feature kAutoplayMutedVideos{"AutoplayMutedVideos",
+                                         base::FEATURE_ENABLED_BY_DEFAULT};
+
+#if !defined(OS_ANDROID)
+const base::Feature kUserGestureRequiredForMediaPlaybackInCrossOriginIframes{
+    "UserGestureRequiredForMediaPlaybackInCrossOriginIframes",
+    base::FEATURE_DISABLED_BY_DEFAULT};
+#endif
+
 #if defined(OS_WIN)
 // Emergency "off switch" for new Windows sandbox security mitigation,
 // sandbox::MITIGATION_EXTENSION_POINT_DISABLE.