VM: [Cleanup] Delete legacy code associated with BranchInstr.

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 RUNTIME_VM_FLOW_GRAPH_BUILDER_H_
 #define RUNTIME_VM_FLOW_GRAPH_BUILDER_H_
 
 #include "platform/assert.h"
 #include "platform/globals.h"
 #include "vm/allocation.h"
@@ skipping 526 matching lines @@
 
  private:
   // Construct and concatenate a Branch instruction to this graph fragment.
   // Closes the fragment and sets the output parameters.
   virtual void ReturnValue(Value* value);
 
   // Either merges the definition into a BranchInstr (Comparison, BooleanNegate)
   // or adds the definition to the graph and returns a use of its value.
   virtual void ReturnDefinition(Definition* definition);
 
-  void MergeBranchWithComparison(ComparisonInstr* comp);
+  void MergeBranchWithStrictCompare(StrictCompareInstr* comp);
   void MergeBranchWithNegate(BooleanNegateInstr* comp);
 
   BlockEntryInstr* CreateSuccessorFor(
       const GrowableArray<TargetEntryInstr**>& branches) const;
 
   void ConnectBranchesTo(const GrowableArray<TargetEntryInstr**>& branches,
                          JoinEntryInstr* join) const;
 
   // Output parameters.
   GrowableArray<TargetEntryInstr**> true_successor_addresses_;
   GrowableArray<TargetEntryInstr**> false_successor_addresses_;
 
   TokenPosition condition_token_pos_;
 };
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_FLOW_GRAPH_BUILDER_H_