Propagate this-specialization to regular (megamorphic) calls

runtime/vm/flow_graph_compiler.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_FLOW_GRAPH_COMPILER_H_
 #define RUNTIME_VM_FLOW_GRAPH_COMPILER_H_
 
 #include "vm/allocation.h"
 #include "vm/assembler.h"
 #include "vm/code_descriptors.h"
@@ skipping 554 matching lines @@
   const ICData* GetOrAddInstanceCallICData(intptr_t deopt_id,
                                            const String& target_name,
                                            const Array& arguments_descriptor,
                                            intptr_t num_args_tested);
 
   const ICData* GetOrAddStaticCallICData(intptr_t deopt_id,
                                          const Function& target,
                                          const Array& arguments_descriptor,
                                          intptr_t num_args_tested);
 
+  static const ICData& TrySpecializeICData(const ICData& ic_data, intptr_t cid);
+
   const ZoneGrowableArray<const ICData*>& deopt_id_to_ic_data() const {
     return *deopt_id_to_ic_data_;
   }
 
   Thread* thread() const { return thread_; }
   Isolate* isolate() const { return thread_->isolate(); }
   Zone* zone() const { return zone_; }
 
   void AddStubCallTarget(const Code& code);
 
@@ skipping 213 matching lines @@
   ZoneGrowableArray<const ICData*>* deopt_id_to_ic_data_;
 
   Array& edge_counters_array_;
 
   DISALLOW_COPY_AND_ASSIGN(FlowGraphCompiler);
 };
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_FLOW_GRAPH_COMPILER_H_