Introduce Definition and Use types.

runtime/vm/flow_graph_builder.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_BUILDER_H_
 #define VM_FLOW_GRAPH_BUILDER_H_
 
 #include "vm/allocation.h"
 #include "vm/ast.h"
 #include "vm/growable_array.h"
@@ skipping 173 matching lines @@
 
   virtual void CompiletimeStringInterpolation(const Function& interpol_func,
                                               const Array& literals);
 
   TempVal* BuildObjectAllocation(ConstructorCallNode* node,
                                  int start_index);
   void BuildConstructorCall(ConstructorCallNode* node,
                             int start_index,
                             Value* alloc_value);
 
-  void BuildStoreContext(const LocalVariable& variable, intptr_t start_index);
-  void BuildLoadContext(const LocalVariable& variable, intptr_t start_index);
+  void BuildStoreContext(const LocalVariable& variable);
+  void BuildLoadContext(const LocalVariable& variable);
 
   void BuildThrowNode(ThrowNode* node);
 
  private:
   // Specify a computation as the final result.  Adds a Do instruction to
   // the graph, but normally overridden in subclasses.
   virtual void ReturnComputation(Computation* computation) {
     AddInstruction(new DoInstr(computation));
   }
 
@@ skipping 134 matching lines @@
   TargetEntryInstr** true_successor_address_;
   TargetEntryInstr** false_successor_address_;
 
   intptr_t condition_node_id_;
   intptr_t condition_token_index_;
 };
 
 }  // namespace dart
 
 #endif  // VM_FLOW_GRAPH_BUILDER_H_