Fix for WebView accessible resources.

extensions/common/extension_messages.h

Index: extensions/common/extension_messages.h
diff --git a/extensions/common/extension_messages.h b/extensions/common/extension_messages.h
index 462ef367759cf0d30765d1f56f9922ad92a7a9d7..f0eb6dccc3bee135aff8cef3498141b56535d633 100644
--- a/extensions/common/extension_messages.h
+++ b/extensions/common/extension_messages.h
@@ -387,6 +387,7 @@ IPC_STRUCT_BEGIN(ExtensionMsg_UpdatePermissions_Params)
   IPC_STRUCT_MEMBER(ExtensionMsg_PermissionSetStruct, withheld_permissions)
 IPC_STRUCT_END()
 
+// -----------------------------------------------------------------------------

[not at google - send to devlin, 2015/09/03 20:17:54]

Please don't add these --------------- comments, but it probably should be
"renderer:" not "renderer."

[paulmeyer, 2015/09/08 18:51:36]

Done.

 // Messages sent from the browser to the renderer.
 
 // The browser sends this message in response to all extension api calls. The
@@ -578,6 +579,11 @@ IPC_MESSAGE_CONTROL1(ExtensionMsg_WatchPages,
 IPC_MESSAGE_CONTROL1(ExtensionMsg_TransferBlobs,
                      std::vector<std::string> /* blob_uuids */)
 
+// Report the WebView partition ID to the WebView guest renderer process.
+IPC_MESSAGE_CONTROL1(ExtensionMsg_SetWebViewPartitionID,
+                     std::string /* webview_partition_id */)
+
+// -----------------------------------------------------------------------------
 // Messages sent from the renderer to the browser.
 
 // A renderer sends this message when an extension process starts an API