Audio notification plumbed from guest WebContents up to embedder.

content/browser/web_contents/web_contents_impl.cc

Index: content/browser/web_contents/web_contents_impl.cc
diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index 3362cc1b63417be749ef6832eabd73c03b175083..76cadf8e1ca262ca9b69753c5225f1a0b4366a5d 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -1290,6 +1290,9 @@ void WebContentsImpl::NotifyNavigationStateChanged(
 
   if (delegate_)
     delegate_->NavigationStateChanged(this, changed_flags);
+
+  if (GetOuterWebContents())
+    GetOuterWebContents()->NotifyNavigationStateChanged(changed_flags);
 }
 
 base::TimeTicks WebContentsImpl::GetLastActiveTime() const {
@@ -3045,7 +3048,9 @@ void WebContentsImpl::InsertCSS(const std::string& css) {
 }
 
 bool WebContentsImpl::WasRecentlyAudible() {
-  return audio_stream_monitor_.WasRecentlyAudible();
+  return audio_stream_monitor_.WasRecentlyAudible() ||
+         (browser_plugin_embedder_ &&
+          browser_plugin_embedder_->WereAnyGuestsRecentlyAudible());
 }
 
 void WebContentsImpl::GetManifest(const GetManifestCallback& callback) {