Emit switchable instance calls when we don't know the complete set of receiver classes for a call s…

runtime/vm/flow_graph_compiler_arm64.cc

Index: runtime/vm/flow_graph_compiler_arm64.cc
diff --git a/runtime/vm/flow_graph_compiler_arm64.cc b/runtime/vm/flow_graph_compiler_arm64.cc
index 2634ae2bc7c70e418f6f5afc94bcf7af009faa0e..eccd6071e1a512a0bc5eef6a98863e5f38889430 100644
--- a/runtime/vm/flow_graph_compiler_arm64.cc
+++ b/runtime/vm/flow_graph_compiler_arm64.cc
@@ -27,18 +27,6 @@ DEFINE_FLAG(bool, trap_on_deoptimization, false, "Trap on deoptimization.");
 DECLARE_FLAG(bool, enable_simd_inline);
 
 
-void MegamorphicSlowPath::EmitNativeCode(FlowGraphCompiler* compiler) {
-  Assembler* assembler = compiler->assembler();
-#define __ assembler->
-  __ Bind(entry_label());
-  __ Comment("MegamorphicSlowPath");
-  compiler->EmitMegamorphicInstanceCall(ic_data_, argument_count_, deopt_id_,
-                                        token_pos_, locs_, try_index_);
-  __ b(exit_label());
-#undef __
-}
-
-
 FlowGraphCompiler::~FlowGraphCompiler() {
   // BlockInfos are zone-allocated, so their destructors are not called.
   // Verify the labels explicitly here.