Enhance the array access API to deal with any objct that implements the list interface.

vm/object_store.h

 // Copyright (c) 2011, 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_STORE_H_
 #define VM_OBJECT_STORE_H_
 
 #include "vm/object.h"
 
 namespace dart {
@@ skipping 16 matching lines @@
     kObjectType,
     kNullType,
     kDynamicType,
     kVoidType,
     kFunctionInterface,
     kNumberInterface,
     kDoubleInterface,
     kIntInterface,
     kBoolInterface,
     kStringInterface,
+    kListInterface,
     kObjectClass,
     kSmiClass,
     kMintClass,
     kBigintClass,
     kDoubleClass,
     kOneByteStringClass,
     kTwoByteStringClass,
     kFourByteStringClass,
     kBoolClass,
     kArrayClass,
@@ skipping 77 matching lines @@
   void set_four_byte_string_class(const Class& value) {
     four_byte_string_class_ = value.raw();
   }
 
   RawType* bool_interface() const { return bool_interface_; }
   void set_bool_interface(const Type& value) { bool_interface_ = value.raw(); }
 
   RawClass* bool_class() const { return bool_class_; }
   void set_bool_class(const Class& value) { bool_class_ = value.raw(); }
 
+  RawType* list_interface() const { return list_interface_; }
+  void set_list_interface(const Type& value) {
+    list_interface_ = value.raw();
+  }
+
   RawClass* array_class() const { return array_class_; }
   void set_array_class(const Class& value) { array_class_ = value.raw(); }
   static intptr_t array_class_offset() {
     return OFFSET_OF(ObjectStore, array_class_);
   }
 
   RawClass* immutable_array_class() const { return immutable_array_class_; }
   void set_immutable_array_class(const Class& value) {
     immutable_array_class_ = value.raw();
   }
@@ skipping 104 matching lines @@
   RawClass* mint_class_;
   RawClass* bigint_class_;
   RawType* double_interface_;
   RawClass* double_class_;
   RawType* string_interface_;
   RawClass* one_byte_string_class_;
   RawClass* two_byte_string_class_;
   RawClass* four_byte_string_class_;
   RawType* bool_interface_;
   RawClass* bool_class_;
+  RawType* list_interface_;
   RawClass* array_class_;
   RawClass* immutable_array_class_;
   RawClass* unhandled_exception_class_;
   RawClass* stacktrace_class_;
   RawClass* jsregexp_class_;
   RawBool* true_value_;
   RawBool* false_value_;
   RawArray* empty_array_;
   RawArray* symbol_table_;
   RawLibrary* core_library_;
   RawLibrary* core_impl_library_;
   RawLibrary* root_library_;
   RawLibrary* registered_libraries_;
   RawArray* pending_classes_;
   RawString* sticky_error_;
   RawContext* empty_context_;
   RawObject** to() { return reinterpret_cast<RawObject**>(&empty_context_); }
 
   friend class SnapshotReader;
 
   DISALLOW_COPY_AND_ASSIGN(ObjectStore);
 };
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_STORE_H_