Implement new optional parameters syntax in the vm (issue 4290).

runtime/vm/flow_graph_inliner.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/flow_graph_inliner.h"
 
 #include "vm/flags.h"
 #include "vm/flow_graph.h"
 #include "vm/flow_graph_builder.h"
 #include "vm/il_printer.h"
@@ skipping 13 matching lines @@
       : FlowGraphVisitor(flow_graph->postorder()),
         caller_graph_(flow_graph),
         next_ssa_temp_index_(flow_graph->max_virtual_register_number()),
         inlined_(false) { }
 
   void TryInlining(const Function& function,
                    GrowableArray<Value*>* arguments,
                    StaticCallInstr* call) {
     // TODO(zerny): Generalize to all calls.
 
-    // Abort if the callee has named parameters.
-    if (function.num_optional_parameters() > 0) {
+    // Abort if the callee has optional parameters.
+    if (function.HasOptionalParameters()) {
       if (FLAG_trace_inlining) {
         OS::Print("Inline aborted %s\nReason: optional parameters\n",
                   function.ToFullyQualifiedCString());
       }
       return;
     }
 
     // Assuming no optional parameters the actual/formal count should match.
     ASSERT(arguments->length() == function.num_fixed_parameters());
 
@@ skipping 125 matching lines @@
     if (FLAG_trace_inlining && FLAG_print_flow_graph) {
       OS::Print("After Inlining of %s\n", flow_graph_->
                 parsed_function().function().ToFullyQualifiedCString());
       FlowGraphPrinter printer(*flow_graph_);
       printer.PrintBlocks();
     }
   }
 }
 
 }  // namespace dart