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

third_party/WebKit/Source/web/WebSettingsImpl.cpp

Index: third_party/WebKit/Source/web/WebSettingsImpl.cpp
diff --git a/third_party/WebKit/Source/web/WebSettingsImpl.cpp b/third_party/WebKit/Source/web/WebSettingsImpl.cpp
index e589765e89054093410fbfe60dd084b8be4a987a..7d9b181d536280ba1c30d85200e2966d440a6c8a 100644
--- a/third_party/WebKit/Source/web/WebSettingsImpl.cpp
+++ b/third_party/WebKit/Source/web/WebSettingsImpl.cpp
@@ -649,6 +649,11 @@ void WebSettingsImpl::setCookieEnabled(bool enabled) {
   m_settings->setCookieEnabled(enabled);
 }
 
+void WebSettingsImpl::setCrossOriginMediaPlaybackRequiresUserGesture(
+    bool required) {
+  m_settings->setCrossOriginMediaPlaybackRequiresUserGesture(required);
+}
+
 void WebSettingsImpl::setNavigateOnDragDrop(bool enabled) {
   m_settings->setNavigateOnDragDrop(enabled);
 }