Revert of Quit the message loop by default in ShellConnectionLost when ApplicationRunner is used

content/common/mojo/mojo_shell_connection_impl.cc

Index: content/common/mojo/mojo_shell_connection_impl.cc
diff --git a/content/common/mojo/mojo_shell_connection_impl.cc b/content/common/mojo/mojo_shell_connection_impl.cc
index 42cfada675d59ca0f06dc9369c907b23e6bba5f6..44310d3e18667fa9c251b5ea286bc87d9a54f91b 100644
--- a/content/common/mojo/mojo_shell_connection_impl.cc
+++ b/content/common/mojo/mojo_shell_connection_impl.cc
@@ -126,6 +126,10 @@
   return found;
 }
 
+void MojoShellConnectionImpl::ShellConnectionLost() {
+  LOG(ERROR) << "Shell connection lost.";
+}
+
 mojo::Connector* MojoShellConnectionImpl::GetConnector() {
   DCHECK(shell_connection_);
   return shell_connection_->connector();