Enable optimizer pipeline for DBC.

runtime/vm/flow_graph_builder.cc

Index: runtime/vm/flow_graph_builder.cc
diff --git a/runtime/vm/flow_graph_builder.cc b/runtime/vm/flow_graph_builder.cc
index 6f34a4668574a1b32bfa88d05ac4358e6f6a2314..bd0766772282199d0ecb66842c6d4865270fea02 100644
--- a/runtime/vm/flow_graph_builder.cc
+++ b/runtime/vm/flow_graph_builder.cc
@@ -4594,15 +4594,7 @@ void FlowGraphBuilder::PruneUnreachable() {
 
 
 void FlowGraphBuilder::Bailout(const char* reason) const {
-  const Function& function = parsed_function_.function();
-  Report::MessageF(Report::kBailout,
-                   Script::Handle(function.script()),
-                   function.token_pos(),
-                   Report::AtLocation,
-                   "FlowGraphBuilder Bailout: %s %s",
-                   String::Handle(function.name()).ToCString(),
-                   reason);
-  UNREACHABLE();
+  parsed_function_.Bailout("FlowGraphBuilder", reason);
 }
 
 }  // namespace dart