Do not hide membership of implementation classes in dart:core.

runtime/vm/raw_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_RAW_OBJECT_H_
 #define VM_RAW_OBJECT_H_
 
 #include "platform/assert.h"
 #include "vm/globals.h"
 #include "vm/token.h"
@@ skipping 382 matching lines @@
   static bool IsNumberClassId(intptr_t index);
   static bool IsIntegerClassId(intptr_t index);
   static bool IsStringClassId(intptr_t index);
   static bool IsOneByteStringClassId(intptr_t index);
   static bool IsTwoByteStringClassId(intptr_t index);
   static bool IsExternalStringClassId(intptr_t index);
   static bool IsBuiltinListClassId(intptr_t index);
   static bool IsTypedDataClassId(intptr_t index);
   static bool IsTypedDataViewClassId(intptr_t index);
   static bool IsExternalTypedDataClassId(intptr_t index);
-  static bool IsImplementationClassId(intptr_t index);
   static bool IsInternalVMdefinedClassId(intptr_t index);
 
   static intptr_t NumberOfTypedDataClasses();
 
  private:
   uword tags_;  // Various object tags (bits).
 
   class WatchedBit : public BitField<bool, kWatchedBit, 1> {};
 
   class MarkBit : public BitField<bool, kMarkBit, 1> {};
@@ skipping 1280 matching lines @@
          (kExternalTypedDataFloat64ArrayCid ==
           kExternalTypedDataInt8ArrayCid + 10) &&
          (kExternalTypedDataFloat32x4ArrayCid ==
           kExternalTypedDataInt8ArrayCid + 11) &&
          (kNullCid == kExternalTypedDataInt8ArrayCid + 12));
   return (index >= kExternalTypedDataInt8ArrayCid &&
           index <= kExternalTypedDataFloat32x4ArrayCid);
 }
 
 
-inline bool RawObject::IsImplementationClassId(intptr_t index) {
-  return IsBuiltinListClassId(index) ||
-      IsStringClassId(index) ||
-      IsNumberClassId(index);
-}
-
-
 inline bool RawObject::IsInternalVMdefinedClassId(intptr_t index) {
   return ((index < kNumPredefinedCids) &&
           !RawObject::IsTypedDataViewClassId(index));
 }
 
 
 inline intptr_t RawObject::NumberOfTypedDataClasses() {
   // Make sure this is updated when new TypedData types are added.
   ASSERT(kTypedDataInt8ArrayViewCid == kTypedDataInt8ArrayCid + 12);
   ASSERT(kExternalTypedDataInt8ArrayCid == kTypedDataInt8ArrayViewCid + 13);
   ASSERT(kNullCid == kExternalTypedDataInt8ArrayCid + 12);
   return (kNullCid - kTypedDataInt8ArrayCid);
 }
 
 }  // namespace dart
 
 #endif  // VM_RAW_OBJECT_H_