Propagate this-specialization to regular (megamorphic) calls

runtime/vm/object.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef RUNTIME_VM_OBJECT_H_
 #define RUNTIME_VM_OBJECT_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/utils.h"
@@ skipping 1991 matching lines @@
   void GetOneClassCheckAt(intptr_t index,
                           intptr_t* class_id,
                           Function* target) const;
   // Only for 'num_args_checked == 1'.
   intptr_t GetCidAt(intptr_t index) const;
 
   intptr_t GetReceiverClassIdAt(intptr_t index) const;
   intptr_t GetClassIdAt(intptr_t index, intptr_t arg_nr) const;
 
   RawFunction* GetTargetAt(intptr_t index) const;
-  RawFunction* GetTargetForReceiverClassId(intptr_t class_id) const;
+  RawFunction* GetTargetForReceiverClassId(intptr_t class_id,
+                                           intptr_t* count_return) const;
 
   RawObject* GetTargetOrCodeAt(intptr_t index) const;
   void SetCodeAt(intptr_t index, const Code& value) const;
   void SetEntryPointAt(intptr_t index, const Smi& value) const;
 
   void IncrementCountAt(intptr_t index, intptr_t value) const;
   void SetCountAt(intptr_t index, intptr_t value) const;
   intptr_t GetCountAt(intptr_t index) const;
   intptr_t AggregateCount() const;
 
@@ skipping 6894 matching lines @@
 
 inline void TypeArguments::SetHash(intptr_t value) const {
   // This is only safe because we create a new Smi, which does not cause
   // heap allocation.
   StoreSmi(&raw_ptr()->hash_, Smi::New(value));
 }
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_OBJECT_H_