remove undetectable strings

src/heap/heap.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_HEAP_HEAP_H_
 #define V8_HEAP_HEAP_H_
 
 #include <cmath>
 
 #include "src/allocation.h"
@@ skipping 84 matching lines @@
     ExternalInternalizedStringWithOneByteDataMap)                              \
   V(Map, external_one_byte_internalized_string_map,                            \
     ExternalOneByteInternalizedStringMap)                                      \
   V(Map, short_external_internalized_string_map,                               \
     ShortExternalInternalizedStringMap)                                        \
   V(Map, short_external_internalized_string_with_one_byte_data_map,            \
     ShortExternalInternalizedStringWithOneByteDataMap)                         \
   V(Map, short_external_one_byte_internalized_string_map,                      \
     ShortExternalOneByteInternalizedStringMap)                                 \
   V(Map, short_external_one_byte_string_map, ShortExternalOneByteStringMap)    \
-  V(Map, undetectable_string_map, UndetectableStringMap)                       \
-  V(Map, undetectable_one_byte_string_map, UndetectableOneByteStringMap)       \
   V(Map, external_int8_array_map, ExternalInt8ArrayMap)                        \
   V(Map, external_uint8_array_map, ExternalUint8ArrayMap)                      \
   V(Map, external_int16_array_map, ExternalInt16ArrayMap)                      \
   V(Map, external_uint16_array_map, ExternalUint16ArrayMap)                    \
   V(Map, external_int32_array_map, ExternalInt32ArrayMap)                      \
   V(Map, external_uint32_array_map, ExternalUint32ArrayMap)                    \
   V(Map, external_float32_array_map, ExternalFloat32ArrayMap)                  \
   V(Map, external_float64_array_map, ExternalFloat64ArrayMap)                  \
   V(Map, external_uint8_clamped_array_map, ExternalUint8ClampedArrayMap)       \
   V(ExternalArray, empty_external_int8_array, EmptyExternalInt8Array)          \
@@ skipping 2477 matching lines @@
   DisallowHeapAllocation no_allocation;  // i.e. no gc allowed.
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(PathTracer);
 };
 #endif  // DEBUG
 }
 }  // namespace v8::internal
 
 #endif  // V8_HEAP_HEAP_H_