Some more cleanup of the finger print checking code.

runtime/vm/symbols.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_SYMBOLS_H_
 #define VM_SYMBOLS_H_
 
 #include "vm/object.h"
 #include "vm/snapshot_ids.h"
 
@@ skipping 399 matching lines @@
     kMaxPredefinedId = kNullCharId + kMaxOneCharCodeSymbol + 1,
   };
 
   // Number of one character symbols being predefined in the predefined_ array.
   static const int kNumberOfOneCharCodeSymbols =
       (kMaxPredefinedId - kNullCharId);
 
   // Offset of Null character which is the predefined character symbol.
   static const int kNullCharCodeSymbolOffset = 0;
 
+  static const String& Symbol(intptr_t index) {
+    ASSERT((index > kIllegal) && (index < kMaxPredefinedId));
+    return *(symbol_handles_[index]);
+  }
+
   // Access methods for one byte character symbols stored in the vm isolate.
   static const String& Dot() {
     return *(symbol_handles_[kNullCharId + '.']);
   }
   static const String& Equals() {
     return *(symbol_handles_[kNullCharId + '=']);
   }
   static const String& Plus() {
     return *(symbol_handles_[kNullCharId + '+']);
   }
@@ skipping 179 matching lines @@
   friend class SnapshotReader;
   friend class SnapshotWriter;
   friend class ApiMessageReader;
 
   DISALLOW_COPY_AND_ASSIGN(Symbols);
 };
 
 }  // namespace dart
 
 #endif  // VM_SYMBOLS_H_