Remove deprecated string features.

runtime/vm/flow_graph_optimizer.h

 // 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.
 
 #ifndef VM_FLOW_GRAPH_OPTIMIZER_H_
 #define VM_FLOW_GRAPH_OPTIMIZER_H_
 
 #include "vm/intermediate_language.h"
 #include "vm/flow_graph.h"
 
@@ skipping 56 matching lines @@
   bool TryReplaceWithBinaryOp(InstanceCallInstr* call, Token::Kind op_kind);
   bool TryReplaceWithUnaryOp(InstanceCallInstr* call, Token::Kind op_kind);
 
   bool TryInlineInstanceGetter(InstanceCallInstr* call);
   bool TryInlineInstanceSetter(InstanceCallInstr* call,
                                const ICData& unary_ic_data);
 
   bool TryInlineInstanceMethod(InstanceCallInstr* call);
   void ReplaceWithInstanceOf(InstanceCallInstr* instr);
 
-  LoadIndexedInstr* BuildStringCharCodeAt(InstanceCallInstr* call,
+  LoadIndexedInstr* BuildStringCodeUnitAt(InstanceCallInstr* call,
                                           intptr_t cid);
 
   LoadIndexedInstr* BuildByteArrayViewLoad(InstanceCallInstr* call,
                                            intptr_t receiver_cid,
                                            intptr_t view_cid);
 
   // Insert a check of 'to_check' determined by 'unary_checks'.  If the
   // check fails it will deoptimize to 'deopt_id' using the deoptimization
   // environment 'deopt_environment'.  The check is inserted immediately
   // before 'insert_before'.
@@ skipping 142 matching lines @@
 
   // Worklists of blocks and definitions.
   GrowableArray<BlockEntryInstr*> block_worklist_;
   GrowableArray<Definition*> definition_worklist_;
 };
 
 
 }  // namespace dart
 
 #endif  // VM_FLOW_GRAPH_OPTIMIZER_H_