Queue postMessage messages destined for a MimeHandlerView guest

content/public/browser/browser_plugin_guest_delegate.h

Index: content/public/browser/browser_plugin_guest_delegate.h
diff --git a/content/public/browser/browser_plugin_guest_delegate.h b/content/public/browser/browser_plugin_guest_delegate.h
index dd2621593d4650483fac8c1e5ee9a50c304c50d9..cb4b1cbec5a1606b74b080c2ba166dc8a3ae8dea 100644
--- a/content/public/browser/browser_plugin_guest_delegate.h
+++ b/content/public/browser/browser_plugin_guest_delegate.h
@@ -81,6 +81,9 @@ class CONTENT_EXPORT BrowserPluginGuestDelegate {
   virtual bool Find(int request_id,
                     const base::string16& search_text,
                     const blink::WebFindOptions& options);
+
+  // Called after the guest's JavaScript onload function has completed.
+  virtual void DocumentOnLoadCompleted(int guest_proxy_routing_id) {}
 };
 
 }  // namespace content