Partial cleanup towards fixing Issue 6726

vm/dart_entry.cc

 // Copyright (c) 2011, 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/dart_entry.h"
 
 #include "vm/code_generator.h"
 #include "vm/compiler.h"
 #include "vm/object_store.h"
 #include "vm/resolver.h"
@@ skipping 284 matching lines @@
                               Resolver::kIsQualified));
   GrowableArray<const Object*> arguments(kNumArguments);
   arguments.Add(&Integer::Handle(Integer::New(port_id)));
   return DartEntry::InvokeStatic(function, arguments, kNoArgumentNames);
 }
 
 
 RawObject* DartLibraryCalls::MapSetAt(const Instance& map,
                                       const Instance& key,
                                       const Instance& value) {
-  String& name = String::Handle(String::New("[]="));
+  String& name = String::Handle(Symbols::AssignIndexToken());
   const Function& function = Function::Handle(
       Resolver::ResolveDynamic(map, name, 3, 0));
   ASSERT(!function.IsNull());
   GrowableArray<const Object*> args(2);
   args.Add(&key);
   args.Add(&value);
   const Array& kNoArgumentNames = Array::Handle();
   const Object& result = Object::Handle(
       DartEntry::InvokeDynamic(map, function, args, kNoArgumentNames));
   return result.raw();
 }
 
 
 RawObject* DartLibraryCalls::PortGetId(const Instance& port) {
   const String& field_name = String::Handle(Symbols::New("_id"));
   const Class& cls = Class::Handle(port.clazz());
   const String& func_name = String::Handle(Field::GetterName(field_name));
   const Function& func = Function::Handle(cls.LookupDynamicFunction(func_name));
   ASSERT(!func.IsNull());
   GrowableArray<const Object*> arguments;
   const Array& kNoArgumentNames = Array::Handle();
   return DartEntry::InvokeDynamic(port, func, arguments, kNoArgumentNames);
 }
 
 
 }  // namespace dart