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

content/browser/renderer_host/render_view_host_impl.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 "content/browser/renderer_host/render_view_host_impl.h"
 
 #include <set>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 422 matching lines @@
 #if defined(OS_ANDROID)
   // On Android, user gestures are normally required, unless that requirement
   // is disabled with a command-line switch or the equivalent field trial is
   // is set to "Enabled".
   prefs.user_gesture_required_for_media_playback = !command_line.HasSwitch(
       switches::kDisableGestureRequirementForMediaPlayback);
 
   prefs.progress_bar_completion = GetProgressBarCompletionPolicy();
 
   prefs.use_solid_color_scrollbars = true;
-#endif
+#else  // defined(OS_ANDROID)
+  prefs.cross_origin_media_playback_requires_user_gesture =
+      base::FeatureList::GetInstance()->IsEnabled(
+          features::kCrossOriginMediaPlaybackRequiresUserGesture);
+#endif  // defined(OS_ANDROID)
 
   prefs.device_supports_touch = ui::GetTouchScreensAvailability() ==
                                 ui::TouchScreensAvailability::ENABLED;
   const std::string touch_enabled_switch =
       command_line.HasSwitch(switches::kTouchEvents)
           ? command_line.GetSwitchValueASCII(switches::kTouchEvents)
           : switches::kTouchEventsAuto;
   prefs.touch_event_api_enabled =
       (touch_enabled_switch == switches::kTouchEventsAuto)
           ? prefs.device_supports_touch
@@ skipping 629 matching lines @@
   } else {
     render_view_ready_on_process_launch_ = true;
   }
 }
 
 void RenderViewHostImpl::RenderViewReady() {
   delegate_->RenderViewReady(this);
 }
 
 }  // namespace content