Simplify compilation of relational operators.

runtime/vm/flow_graph_optimizer.h

Index: runtime/vm/flow_graph_optimizer.h
===================================================================
--- runtime/vm/flow_graph_optimizer.h	(revision 27045)
+++ runtime/vm/flow_graph_optimizer.h	(working copy)
@@ -51,7 +51,6 @@
 
   virtual void VisitStaticCall(StaticCallInstr* instr);
   virtual void VisitInstanceCall(InstanceCallInstr* instr);
-  virtual void VisitRelationalOp(RelationalOpInstr* instr);
   virtual void VisitEqualityCompare(EqualityCompareInstr* instr);
   virtual void VisitBranch(BranchInstr* instr);
   virtual void VisitStrictCompare(StrictCompareInstr* instr);
@@ -82,6 +81,8 @@
   bool TryReplaceWithBinaryOp(InstanceCallInstr* call, Token::Kind op_kind);
   bool TryReplaceWithUnaryOp(InstanceCallInstr* call, Token::Kind op_kind);
 
+  bool TryReplaceWithRelationalOp(InstanceCallInstr* call, Token::Kind op_kind);
+
   bool TryInlineInstanceGetter(InstanceCallInstr* call);
   bool TryInlineInstanceSetter(InstanceCallInstr* call,
                                const ICData& unary_ic_data);
@@ -163,12 +164,6 @@
   void ReplaceWithMathCFunction(InstanceCallInstr* call,
                                 MethodRecognizer::Kind recognized_kind);
 
-  void HandleComparison(ComparisonInstr* comp,
-                        const ICData& ic_data,
-                        Instruction* current_instruction);
-
-  void HandleRelationalOp(RelationalOpInstr* comp);
-
   // Visit an equality compare.  The current instruction can be the
   // comparison itself or a branch on the comparison.
   template <typename T>