Revert "Reapply "Eliminate dependencies on assemblers and code stubs in precompiled runtime.""

runtime/vm/flow_graph.cc

Index: runtime/vm/flow_graph.cc
diff --git a/runtime/vm/flow_graph.cc b/runtime/vm/flow_graph.cc
index 7f578ce6cff8e51c5d89857ffafe2e204c46ae4c..ddbcc2652648c668e6f33785b73c5ab7ac547960 100644
--- a/runtime/vm/flow_graph.cc
+++ b/runtime/vm/flow_graph.cc
@@ -2,8 +2,6 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-#if !defined(DART_PRECOMPILED_RUNTIME)
-
 #include "vm/flow_graph.h"
 
 #include "vm/bit_vector.h"
@@ -2273,5 +2271,3 @@ void FlowGraph::AppendExtractNthOutputForMerged(Definition* instr,
 }
 
 }  // namespace dart
-
-#endif  // !defined(DART_PRECOMPILED_RUNTIME)