[runtime] Rename IsUndetectableObject to IsUndetectable.

src/objects.h

 // Copyright 2015 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_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 
 #include "src/assert-scope.h"
@@ skipping 959 matching lines @@
   V(HashTable)                     \
   V(Dictionary)                    \
   V(StringTable)                   \
   V(NormalizedMapCache)            \
   V(CompilationCacheTable)         \
   V(CodeCacheHashTable)            \
   V(PolymorphicCodeCacheHashTable) \
   V(MapCache)                      \
   V(JSGlobalObject)                \
   V(JSGlobalProxy)                 \
-  V(UndetectableObject)            \
+  V(Undetectable)                  \
   V(AccessCheckNeeded)             \
   V(Callable)                      \
   V(Function)                      \
   V(Constructor)                   \
   V(TemplateInfo)                  \
   V(Filler)                        \
   V(FixedArrayBase)                \
   V(External)                      \
   V(Struct)                        \
   V(Cell)                          \
@@ skipping 9873 matching lines @@
     }
     return value;
   }
 };
 
 
 }  // NOLINT, false-positive due to second-order macros.
 }  // NOLINT, false-positive due to second-order macros.
 
 #endif  // V8_OBJECTS_H_