Expose functionality to create a stack trace to internal vm code.

runtime/vm/compiler.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // 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.
 
 #include "vm/compiler.h"
 
 #include "vm/assembler.h"
 
 #include "vm/ast_printer.h"
 #include "vm/block_scheduler.h"
@@ skipping 285 matching lines @@
                  FLAG_deoptimization_counter_threshold);
           const Code& unoptimized_code =
               Code::Handle(function.unoptimized_code());
           ic_data_array = unoptimized_code.ExtractTypeFeedbackArray();
         }
 
         // Build the flow graph.
         FlowGraphBuilder builder(parsed_function,
                                  ic_data_array,
                                  NULL,  // NULL = not inlining.
-                                 osr_id);
+                                 osr_id,
+                                 optimized);
         flow_graph = builder.BuildGraph();
       }
 
       if (FLAG_print_flow_graph ||
           (optimized && FLAG_print_flow_graph_optimized)) {
         if (osr_id == Isolate::kNoDeoptId) {
           FlowGraphPrinter::PrintGraph("Before Optimizations", flow_graph);
         } else {
           FlowGraphPrinter::PrintGraph("For OSR", flow_graph);
         }
@@ skipping 642 matching lines @@
     const Object& result =
       Object::Handle(isolate->object_store()->sticky_error());
     isolate->object_store()->clear_sticky_error();
     return result.raw();
   }
   UNREACHABLE();
   return Object::null();
 }
 
 }  // namespace dart