services/shell: Fix running the connection-lost callback.

content/common/mojo/mojo_shell_connection_impl.h

Index: content/common/mojo/mojo_shell_connection_impl.h
diff --git a/content/common/mojo/mojo_shell_connection_impl.h b/content/common/mojo/mojo_shell_connection_impl.h
index 3ad19d239df3fa46800713cf319894035da983f1..b4946da5fa2df91072d4937f50427b664ce78719 100644
--- a/content/common/mojo/mojo_shell_connection_impl.h
+++ b/content/common/mojo/mojo_shell_connection_impl.h
@@ -53,6 +53,7 @@ class MojoShellConnectionImpl : public MojoShellConnection,
                   const shell::Identity& identity,
                   uint32_t id) override;
   bool AcceptConnection(shell::Connection* connection) override;
+  bool ShellConnectionLost() override;
 
   // MojoShellConnection:
   shell::Connector* GetConnector() override;
@@ -63,6 +64,7 @@ class MojoShellConnectionImpl : public MojoShellConnection,
   std::unique_ptr<Listener> RemoveListener(Listener* listener) override;
 
   const bool external_;
+  bool connection_lost_;
   std::unique_ptr<shell::ShellConnection> shell_connection_;
   std::vector<Listener*> listeners_;