VM: Fix bug in type propagation at conditionals.

runtime/vm/flow_graph_type_propagator.h

 // Copyright (c) 2013, 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_TYPE_PROPAGATOR_H_
 #define VM_FLOW_GRAPH_TYPE_PROPAGATOR_H_
 
 #include "vm/flow_graph.h"
 #include "vm/intermediate_language.h"
 
 namespace dart {
 
 class FlowGraphTypePropagator : public FlowGraphVisitor {
  public:
   static void Propagate(FlowGraph* flow_graph);
 
  private:
   explicit FlowGraphTypePropagator(FlowGraph* flow_graph);
 
   void Propagate();
 
   void PropagateRecursive(BlockEntryInstr* block);
-  void HandleBranchOnStrictCompare(BlockEntryInstr* block);
 
   void RollbackTo(intptr_t rollback_point);
 
   void VisitValue(Value* value);
 
   virtual void VisitJoinEntry(JoinEntryInstr* instr);
   virtual void VisitCheckSmi(CheckSmiInstr* instr);
   virtual void VisitCheckClass(CheckClassInstr* instr);
   virtual void VisitCheckClassId(CheckClassIdInstr* instr);
   virtual void VisitGuardFieldClass(GuardFieldClassInstr* instr);
@@ skipping 55 matching lines @@
     intptr_t index_;
     CompileType* type_;
   };
 
   GrowableArray<RollbackEntry> rollback_;
 };
 
 }  // namespace dart
 
 #endif  // VM_FLOW_GRAPH_TYPE_PROPAGATOR_H_