Introduce classes for string and name indexes

runtime/vm/kernel_binary_flowgraph.h

 // Copyright (c) 2017, 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 RUNTIME_VM_KERNEL_BINARY_FLOWGRAPH_H_
 #define RUNTIME_VM_KERNEL_BINARY_FLOWGRAPH_H_
 
 #if !defined(DART_PRECOMPILED_RUNTIME)
 
 #include <map>
@@ skipping 58 matching lines @@
   virtual ~StreamingFlowGraphBuilder() {}
 
   Fragment BuildAt(intptr_t kernel_offset);
 
  private:
   intptr_t ReaderOffset();
   void SetOffset(intptr_t offset);
   void SkipBytes(intptr_t skip);
   uint32_t ReadUInt();
   intptr_t ReadListLength();
+  NameIndex ReadCanonicalNameReference();
   TokenPosition ReadPosition(bool record = true);
   Tag ReadTag(uint8_t* payload = NULL);
 
   CatchBlock* catch_block();
   ScopeBuildingResult* scopes();
   ParsedFunction* parsed_function();
 
   Fragment DebugStepCheck(TokenPosition position);
   Fragment LoadLocal(LocalVariable* variable);
   Fragment PushArgument();
@@ skipping 27 matching lines @@
 
   friend class StreamingConstantEvaluator;
 };
 
 
 }  // namespace kernel
 }  // namespace dart
 
 #endif  // !defined(DART_PRECOMPILED_RUNTIME)
 #endif  // RUNTIME_VM_KERNEL_BINARY_FLOWGRAPH_H_