Factor out code that looks up a canonical type and adds it to the canonical_types_ array if necessa…

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 VM_OBJECT_H_
 #define VM_OBJECT_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/utils.h"
@@ skipping 1470 matching lines @@
   static bool TypeTestNonRecursive(
       const Class& cls,
       TypeTestKind test_kind,
       const TypeArguments& type_arguments,
       const Class& other,
       const TypeArguments& other_type_arguments,
       Error* bound_error,
       TrailPtr bound_trail,
       Heap::Space space);
 
+  RawAbstractType* LookupCanonicalType(const AbstractType& type,
+                                       intptr_t start_index) const;
+
   FINAL_HEAP_OBJECT_IMPLEMENTATION(Class, Object);
   friend class AbstractType;
   friend class Instance;
   friend class Object;
   friend class Type;
   friend class FunctionType;
   friend class Intrinsifier;
   friend class Precompiler;
 };
 
@@ skipping 6962 matching lines @@
 
 
 RawObject* MegamorphicCache::GetTargetFunction(const Array& array,
                                                intptr_t index) {
   return array.At((index * kEntryLength) + kTargetFunctionIndex);
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_