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mojo/application/public/cpp/lib/application_impl.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "mojo/application/public/cpp/application_impl.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 148 matching lines @@
   // If by the time we got the reply from the shell, more requests had come in
   // then we don't want to quit the app anymore so we return false. Otherwise
   // |quit_requested_| is true so we tell the shell to proceed with the quit.
   callback.Run(quit_requested_);
   if (quit_requested_)
     QuitNow();
 }
 
 void ApplicationImpl::OnConnectionError() {
   base::WeakPtr<ApplicationImpl> ptr(weak_factory_.GetWeakPtr());
-  QuitNow();
+
+  // We give the delegate notice first, since it might want to do something on
+  // shell connection errors other than immediate termination of the run
+  // loop. The application might want to continue servicing connections other
+  // than the one to the shell.
+  bool quit_now = delegate_->OnShellConnectionError();
+  if (quit_now)
+    QuitNow();
   if (!ptr)
     return;
   shell_ = nullptr;
 }
 
 }  // namespace mojo