Add ApplicationDelegate::Quit()

mojo/public/cpp/application/application_impl.h

Index: mojo/public/cpp/application/application_impl.h
diff --git a/mojo/public/cpp/application/application_impl.h b/mojo/public/cpp/application/application_impl.h
index 21d44d3cc667a726b742a1664b6f2eb4678ec0a0..6d7c66878b869ec6acbd9ded5bdb731ed1271b1b 100644
--- a/mojo/public/cpp/application/application_impl.h
+++ b/mojo/public/cpp/application/application_impl.h
@@ -7,6 +7,7 @@
 #include <vector>
 
 #include "mojo/public/cpp/application/application_connection.h"
+#include "mojo/public/cpp/application/application_delegate.h"
 #include "mojo/public/cpp/application/lib/service_connector.h"
 #include "mojo/public/cpp/application/lib/service_registry.h"
 #include "mojo/public/cpp/system/core.h"
@@ -15,8 +16,6 @@
 
 namespace mojo {
 
-class ApplicationDelegate;
-
 // Utility class for communicating with the Shell, and providing Services
 // to clients.
 //
@@ -107,6 +106,7 @@ class ApplicationImpl : public Application {
   void ClearConnections();
 
   void OnShellError() {
+    delegate_->Quit();
     ClearConnections();
     Terminate();
   }