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

chrome/browser/about_flags.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 "chrome/browser/about_flags.h"
 
 #include <iterator>
 #include <map>
 #include <set>
 #include <utility>
@@ skipping 1937 matching lines @@
                                switches::kDisableFullscreenTabDetaching)},
     {"enable-fullscreen-toolbar-reveal",
      IDS_FLAGS_FULLSCREEN_TOOLBAR_REVEAL_NAME,
      IDS_FLAGS_FULLSCREEN_TOOLBAR_REVEAL_DESCRIPTION, kOsMac,
      SINGLE_VALUE_TYPE(switches::kEnableFullscreenToolbarReveal)},
 #endif  // OS_MACOSX
 #if defined(OS_ANDROID)
     {"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)},
     {"passive-listener-default", IDS_FLAGS_PASSIVE_EVENT_LISTENER_DEFAULT_NAME,
      IDS_FLAGS_PASSIVE_EVENT_LISTENER_DEFAULT_DESCRIPTION, kOsAll,
      MULTI_VALUE_TYPE(kPassiveListenersChoices)},
     {"document-passive-event-listeners",
      IDS_FLAGS_PASSIVE_DOCUMENT_EVENT_LISTENERS_NAME,
      IDS_FLAGS_PASSIVE_DOCUMENT_EVENT_LISTENERS_DESCRIPTION, kOsAll,
      FEATURE_VALUE_TYPE(features::kPassiveDocumentEventListeners)},
@@ skipping 126 matching lines @@
     {"enable-consistent-omnibox-geolocation",
      IDS_FLAGS_ENABLE_CONSISTENT_OMNIBOX_GEOLOCATION_NAME,
      IDS_FLAGS_ENABLE_CONSISTENT_OMNIBOX_GEOLOCATION_DESCRIPTION, kOsAndroid,
      FEATURE_VALUE_TYPE(features::kConsistentOmniboxGeolocation)},
     {"concurrent-background-loading-on-svelte",
      IDS_FLAGS_OFFLINE_PAGES_SVELTE_CONCURRENT_LOADING_NAME,
      IDS_FLAGS_OFFLINE_PAGES_SVELTE_CONCURRENT_LOADING_DESCRIPTION, kOsAndroid,
      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.
 };
 
 class FlagsStateSingleton {
  public:
   FlagsStateSingleton()
       : flags_state_(kFeatureEntries, arraysize(kFeatureEntries)) {}
   ~FlagsStateSingleton() {}
@@ skipping 188 matching lines @@
 const base::HistogramBase::Sample kBadSwitchFormatHistogramId = 0;
 
 const FeatureEntry* GetFeatureEntries(size_t* count) {
   *count = arraysize(kFeatureEntries);
   return kFeatureEntries;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags