Propagate this-specialization to regular (megamorphic) calls

runtime/vm/jit_optimizer.cc

Index: runtime/vm/jit_optimizer.cc
diff --git a/runtime/vm/jit_optimizer.cc b/runtime/vm/jit_optimizer.cc
index 719f359c116b6fc679b2f6a9c0a1275ad2fa4b60..0d33e40d61bfcee06b12e2a536a2e6b29b7070d1 100644
--- a/runtime/vm/jit_optimizer.cc
+++ b/runtime/vm/jit_optimizer.cc
@@ -192,33 +192,6 @@ bool JitOptimizer::TryCreateICData(InstanceCallInstr* call) {
 }
 
 
-const ICData& JitOptimizer::TrySpecializeICData(const ICData& ic_data,
-                                                intptr_t cid) {
-  ASSERT(ic_data.NumArgsTested() == 1);
-
-  if ((ic_data.NumberOfUsedChecks() == 1) && ic_data.HasReceiverClassId(cid)) {
-    return ic_data;  // Nothing to do
-  }
-
-  const Function& function =
-      Function::Handle(Z, ic_data.GetTargetForReceiverClassId(cid));
-  // TODO(fschneider): Try looking up the function on the class if it is
-  // not found in the ICData.
-  if (!function.IsNull()) {
-    const ICData& new_ic_data = ICData::ZoneHandle(
-        Z, ICData::New(Function::Handle(Z, ic_data.Owner()),
-                       String::Handle(Z, ic_data.target_name()),
-                       Object::empty_array(),  // Dummy argument descriptor.
-                       ic_data.deopt_id(), ic_data.NumArgsTested(), false));
-    new_ic_data.SetDeoptReasons(ic_data.DeoptReasons());
-    new_ic_data.AddReceiverCheck(cid, function);
-    return new_ic_data;
-  }
-
-  return ic_data;
-}
-
-
 void JitOptimizer::SpecializePolymorphicInstanceCall(
     PolymorphicInstanceCallInstr* call) {
   if (!FLAG_polymorphic_with_deopt) {
@@ -235,7 +208,8 @@ void JitOptimizer::SpecializePolymorphicInstanceCall(
     return;  // No information about receiver was infered.
   }
 
-  const ICData& ic_data = TrySpecializeICData(call->ic_data(), receiver_cid);
+  const ICData& ic_data =
+      FlowGraphCompiler::TrySpecializeICData(call->ic_data(), receiver_cid);
   if (ic_data.raw() == call->ic_data().raw()) {
     // No specialization.
     return;