Fix message routing for BrowserPlugin in iframe

extensions/shell/renderer/shell_content_renderer_client.cc

Index: extensions/shell/renderer/shell_content_renderer_client.cc
diff --git a/extensions/shell/renderer/shell_content_renderer_client.cc b/extensions/shell/renderer/shell_content_renderer_client.cc
index 2d2121451a85f7a97907212dabefc70300f7346b..108569737feebef3dbdd5b37ad7f974b51f65b71 100644
--- a/extensions/shell/renderer/shell_content_renderer_client.cc
+++ b/extensions/shell/renderer/shell_content_renderer_client.cc
@@ -14,6 +14,7 @@
 #include "extensions/renderer/dispatcher.h"
 #include "extensions/renderer/extension_helper.h"
 #include "extensions/renderer/guest_view/extensions_guest_view_container.h"
+#include "extensions/renderer/guest_view/guest_view_container.h"
 #include "extensions/renderer/guest_view/mime_handler_view/mime_handler_view_container.h"
 #include "extensions/shell/common/shell_extensions_client.h"
 #include "extensions/shell/renderer/shell_extensions_renderer_client.h"
@@ -131,6 +132,11 @@ blink::WebPlugin* ShellContentRendererClient::CreatePluginReplacement(
   return NULL;
 }
 
+bool ShellContentRendererClient::ShouldForwardToGuestContainer(
+    const IPC::Message& msg) {
+  return GuestViewContainer::HandlesMessage(msg);
+}
+
 bool ShellContentRendererClient::WillSendRequest(
     blink::WebFrame* frame,
     ui::PageTransition transition_type,