Hide internal details of VM string implementation.

runtime/vm/intermediate_language.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_INTERMEDIATE_LANGUAGE_H_
 #define VM_INTERMEDIATE_LANGUAGE_H_
 
 #include "vm/allocation.h"
 #include "vm/ast.h"
 #include "vm/growable_array.h"
@@ skipping 17 matching lines @@
 class Range;
 
 
 // TODO(srdjan): Add _ByteArrayBase, get:length.
 
 #define RECOGNIZED_LIST(V)                                                     \
   V(_ObjectArray, get:length, ObjectArrayLength)                               \
   V(_ImmutableArray, get:length, ImmutableArrayLength)                         \
   V(_GrowableObjectArray, get:length, GrowableArrayLength)                     \
   V(_GrowableObjectArray, get:capacity, GrowableArrayCapacity)                 \
-  V(StringBase, get:length, StringBaseLength)                                  \
-  V(StringBase, isEmpty, StringBaseIsEmpty)                                    \
+  V(_StringBase, get:length, StringBaseLength)                                 \
+  V(_StringBase, isEmpty, StringBaseIsEmpty)                                   \
   V(_IntegerImplementation, toDouble, IntegerToDouble)                         \
   V(_Double, toDouble, DoubleToDouble)                                         \
   V(::, sqrt, MathSqrt)                                                        \
 
 // Class that recognizes the name and owner of a function and returns the
 // corresponding enum. See RECOGNIZED_LIST above for list of recognizable
 // functions.
 class MethodRecognizer : public AllStatic {
  public:
   enum Kind {
@@ skipping 4073 matching lines @@
   ForwardInstructionIterator* current_iterator_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(FlowGraphVisitor);
 };
 
 
 }  // namespace dart
 
 #endif  // VM_INTERMEDIATE_LANGUAGE_H_