Fix message routing for BrowserPlugin in iframe

chrome/renderer/chrome_content_renderer_client.cc

Index: chrome/renderer/chrome_content_renderer_client.cc
diff --git a/chrome/renderer/chrome_content_renderer_client.cc b/chrome/renderer/chrome_content_renderer_client.cc
index f252157d977aa2f453853b6be7967defe019e75e..8ae31c7576f0e54867ce3a93a976ff9e90854e81 100644
--- a/chrome/renderer/chrome_content_renderer_client.cc
+++ b/chrome/renderer/chrome_content_renderer_client.cc
@@ -121,6 +121,7 @@
 #include "extensions/renderer/extension_helper.h"
 #include "extensions/renderer/extensions_render_frame_observer.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/renderer/script_context.h"
 #endif
@@ -1269,6 +1270,13 @@ bool ChromeContentRendererClient::ShouldFork(WebFrame* frame,
   return false;
 }
 
+#if defined(ENABLE_EXTENSIONS)
+bool ChromeContentRendererClient::ShouldForwardToGuestContainer(
+    const IPC::Message& msg) {
+  return extensions::GuestViewContainer::HandlesMessage(msg);
+}
+#endif
+
 bool ChromeContentRendererClient::WillSendRequest(
     blink::WebFrame* frame,
     ui::PageTransition transition_type,