mandoline filesystem: Save cookie data to the mojo:filesystem.

mojo/application/public/cpp/application_delegate.h

Index: mojo/application/public/cpp/application_delegate.h
diff --git a/mojo/application/public/cpp/application_delegate.h b/mojo/application/public/cpp/application_delegate.h
index 0d57097c048dbb51b1dce0f2628d9f71d7f30487..876ad403fd8cfd1d2298025f414cd5082bb68025 100644
--- a/mojo/application/public/cpp/application_delegate.h
+++ b/mojo/application/public/cpp/application_delegate.h
@@ -38,6 +38,13 @@ class ApplicationDelegate {
   // the |connection| object will be destroyed.
   virtual void OnWillCloseConnection(ApplicationConnection* connection) {}
 
+  // Called when the shell connection has a connection error.
+  //
+  // Return true to shutdown the application. Return false to skip shutting
+  // down the connection, but user is then required to call
+  // ApplicationImpl::QuitNow() when done.
+  virtual bool OnShellConnectionError();
+
   // Called before ApplicationImpl::Terminate(). After returning from this call
   // the delegate can no longer rely on the main run loop still running.
   virtual void Quit();