Fix for WebView accessible resources.

chrome/browser/extensions/extension_service.cc

Index: chrome/browser/extensions/extension_service.cc
diff --git a/chrome/browser/extensions/extension_service.cc b/chrome/browser/extensions/extension_service.cc
index 96e5fbff576f359e088cb9e4f2ed6823668c5b42..f3c68eaeb238966d6de6745a9606bdd61a754c61 100644
--- a/chrome/browser/extensions/extension_service.cc
+++ b/chrome/browser/extensions/extension_service.cc
@@ -72,6 +72,7 @@
 #include "extensions/browser/extension_registry.h"
 #include "extensions/browser/extension_system.h"
 #include "extensions/browser/extensions_browser_client.h"
+#include "extensions/browser/guest_view/web_view/web_view_guest.h"
 #include "extensions/browser/install_flag.h"
 #include "extensions/browser/runtime_data.h"
 #include "extensions/browser/uninstall_reason.h"
@@ -1045,8 +1046,9 @@ void ExtensionService::NotifyExtensionLoaded(const Extension* extension) {
         std::vector<ExtensionMsg_Loaded_Params> loaded_extensions(
             1, ExtensionMsg_Loaded_Params(extension,
                                           false /* no tab permissions */));
-        host->Send(
-            new ExtensionMsg_Loaded(loaded_extensions));
+        host->Send(new ExtensionMsg_SetWebViewPartitionID(
+            extensions::WebViewGuest::GetPartitionID(host)));

[not at google - send to devlin, 2015/08/31 18:31:44]

You should only need to tell host renderers about their partition IDs, not all
renderers, so this should be unnecessary.

[paulmeyer, 2015/08/31 21:40:08]

Done.

+        host->Send(new ExtensionMsg_Loaded(loaded_extensions));
       }
     }
   }