Fix message routing for BrowserPlugin in iframe

extensions/renderer/guest_view/extensions_guest_view_container.cc

Index: extensions/renderer/guest_view/extensions_guest_view_container.cc
diff --git a/extensions/renderer/guest_view/extensions_guest_view_container.cc b/extensions/renderer/guest_view/extensions_guest_view_container.cc
index 94735200dc026e1c3da3deebf98034a3031e03f9..c9ac9416eaed95f9f1a4ba0292acbf70fc5abc01 100644
--- a/extensions/renderer/guest_view/extensions_guest_view_container.cc
+++ b/extensions/renderer/guest_view/extensions_guest_view_container.cc
@@ -186,6 +186,12 @@ void ExtensionsGuestViewContainer::RegisterDestructionCallback(
   destruction_isolate_ = isolate;
 }
 
+bool ExtensionsGuestViewContainer::OnMessageReceived(
+    const IPC::Message& message) {
+  OnHandleCallback(message);
+  return true;
+}
+
 void ExtensionsGuestViewContainer::SetElementInstanceID(
     int element_instance_id) {
   GuestViewContainer::SetElementInstanceID(element_instance_id);
@@ -202,16 +208,6 @@ void ExtensionsGuestViewContainer::Ready() {
   PerformPendingRequest();
 }
 
-bool ExtensionsGuestViewContainer::HandlesMessage(const IPC::Message& message) {
-  return (message.type() == ExtensionMsg_GuestAttached::ID) ||
-      (message.type() == ExtensionMsg_GuestDetached::ID);
-}
-
-bool ExtensionsGuestViewContainer::OnMessage(const IPC::Message& message) {
-  OnHandleCallback(message);
-  return true;
-}
-
 void ExtensionsGuestViewContainer::OnHandleCallback(
     const IPC::Message& message) {
   // Handle the callback for the current request with a pending response.