Make sure that Content Handled application can be connected multiple times.

mojo/shell/dynamic_application_loader.h

Index: mojo/shell/dynamic_application_loader.h
diff --git a/mojo/shell/dynamic_application_loader.h b/mojo/shell/dynamic_application_loader.h
index 5644100000bc9e1137ae93ca62a3aa634a58641d..33357a48473735e68d5fe8b5777d62bb1dd4829f 100644
--- a/mojo/shell/dynamic_application_loader.h
+++ b/mojo/shell/dynamic_application_loader.h
@@ -40,6 +40,7 @@ class DynamicApplicationLoader : public ApplicationLoader {
   // ApplicationLoader methods:
   void Load(ApplicationManager* manager,
             const GURL& url,
+            ScopedMessagePipeHandle shell_handle,
             scoped_refptr<LoadCallbacks> callbacks) override;
   void OnApplicationError(ApplicationManager* manager,
                           const GURL& url) override;