Initial support for polymorphic inlining.

runtime/vm/flow_graph_optimizer.h

Index: runtime/vm/flow_graph_optimizer.h
diff --git a/runtime/vm/flow_graph_optimizer.h b/runtime/vm/flow_graph_optimizer.h
index 980890bf59c0741c3aac7ea13ca27105022c7f75..df94f4bcc003aab33d77d1130de5bd2aa0fc7f0d 100644
--- a/runtime/vm/flow_graph_optimizer.h
+++ b/runtime/vm/flow_graph_optimizer.h
@@ -288,16 +288,16 @@ class BranchSimplifier : public AllStatic {
  public:
   static void Simplify(FlowGraph* flow_graph);
 
- private:
-  // Match an instance of the pattern to rewrite.  See the implementation
-  // for the patterns that are handled by this pass.
-  static bool Match(JoinEntryInstr* block);
-
   // Replace a target entry instruction with a join entry instruction.  Does
   // not update the original target's predecessors to point to the new block
   // and does not replace the target in already computed block order lists.
   static JoinEntryInstr* ToJoinEntry(TargetEntryInstr* target);
 
+ private:
+  // Match an instance of the pattern to rewrite.  See the implementation
+  // for the patterns that are handled by this pass.
+  static bool Match(JoinEntryInstr* block);
+
   // Duplicate a constant, assigning it a new SSA name.
   static ConstantInstr* CloneConstant(FlowGraph* flow_graph,
                                       ConstantInstr* constant);