Move resolving of natives to a late stage (during code emission). That eliminates unnecessary nativ…

runtime/vm/intermediate_language_arm.cc

Index: runtime/vm/intermediate_language_arm.cc
diff --git a/runtime/vm/intermediate_language_arm.cc b/runtime/vm/intermediate_language_arm.cc
index a82b455e6fb9505ade8c9fa33da87938c1c897e9..1f547339a0fa2e628a9edaad925c206766d08512 100644
--- a/runtime/vm/intermediate_language_arm.cc
+++ b/runtime/vm/intermediate_language_arm.cc
@@ -925,6 +925,7 @@ LocationSummary* NativeCallInstr::MakeLocationSummary(Zone* zone,
 
 
 void NativeCallInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
+  SetupNative();
   const Register result = locs()->out(0).reg();
 
   // Push the result place holder initialized to NULL.
@@ -942,7 +943,7 @@ void NativeCallInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   uword entry;
   const intptr_t argc_tag = NativeArguments::ComputeArgcTag(function());
   const bool is_leaf_call =
-    (argc_tag & NativeArguments::AutoSetupScopeMask()) == 0;
+      (argc_tag & NativeArguments::AutoSetupScopeMask()) == 0;
   const StubEntry* stub_entry;
   if (link_lazily()) {
     stub_entry = StubCode::CallBootstrapCFunction_entry();