Audio notification plumbed from guest WebContents up to embedder.

content/browser/browser_plugin/browser_plugin_embedder.cc

Index: content/browser/browser_plugin/browser_plugin_embedder.cc
diff --git a/content/browser/browser_plugin/browser_plugin_embedder.cc b/content/browser/browser_plugin/browser_plugin_embedder.cc
index 274315ecd3b9e022242696df9ea3938812a6e682..f02b5ae9b8beff3fca8c4704e7298f6081224118 100644
--- a/content/browser/browser_plugin/browser_plugin_embedder.cc
+++ b/content/browser/browser_plugin/browser_plugin_embedder.cc
@@ -219,6 +219,17 @@ BrowserPluginGuest* BrowserPluginEmbedder::GetFullPageGuest() {
 }
 
 // static
+bool BrowserPluginEmbedder::GuestRecentlyAudibleCallback(WebContents* guest) {
+  return guest->WasRecentlyAudible();
+}
+
+bool BrowserPluginEmbedder::WereAnyGuestsRecentlyAudible() {
+  return GetBrowserPluginGuestManager()->ForEachGuest(
+      web_contents(),
+      base::Bind(&BrowserPluginEmbedder::GuestRecentlyAudibleCallback));
+}
+
+// static
 bool BrowserPluginEmbedder::UnlockMouseIfNecessaryCallback(bool* mouse_unlocked,
                                                            WebContents* guest) {
   *mouse_unlocked |= static_cast<WebContentsImpl*>(guest)