Fix for WebView accessible resources.

extensions/browser/renderer_startup_helper.cc

Index: extensions/browser/renderer_startup_helper.cc
diff --git a/extensions/browser/renderer_startup_helper.cc b/extensions/browser/renderer_startup_helper.cc
index 99c7b91de1cd641dc683a84ba674631b1b494dd2..a35e22c5bef18f341d328ba72e2bc56637208f74 100644
--- a/extensions/browser/renderer_startup_helper.cc
+++ b/extensions/browser/renderer_startup_helper.cc
@@ -12,6 +12,7 @@
 #include "extensions/browser/extension_function_dispatcher.h"
 #include "extensions/browser/extension_registry.h"
 #include "extensions/browser/extensions_browser_client.h"
+#include "extensions/browser/guest_view/web_view/web_view_guest.h"
 #include "extensions/common/extension_messages.h"
 #include "extensions/common/extension_set.h"
 #include "extensions/common/extensions_client.h"
@@ -72,7 +73,8 @@ void RendererStartupHelper::Observe(
           ExtensionMsg_Loaded_Params(ext.get(), include_tab_permissions));
     }
   }
-  process->Send(new ExtensionMsg_Loaded(loaded_extensions));
+  process->Send(new ExtensionMsg_Loaded(loaded_extensions,
+                                        WebViewGuest::GetPartitionID(process)));
 }
 
 //////////////////////////////////////////////////////////////////////////////