[runtime] Remove obsolete Object::IsSpecFunction.

src/objects.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_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 
 #include "src/allocation.h"
@@ skipping 1016 matching lines @@
   INLINE(bool IsStruct() const);
 #define DECLARE_STRUCT_PREDICATE(NAME, Name, name) \
   INLINE(bool Is##Name() const);
   STRUCT_LIST(DECLARE_STRUCT_PREDICATE)
 #undef DECLARE_STRUCT_PREDICATE
 
   // ES6, section 7.2.3 IsCallable.
   INLINE(bool IsCallable() const);
 
   INLINE(bool IsSpecObject()) const;
-  // TODO(rossberg): IsSpecFunction should be removed in favor of IsCallable.
-  INLINE(bool IsSpecFunction()) const;
   INLINE(bool IsTemplateInfo()) const;
   INLINE(bool IsNameDictionary() const);
   INLINE(bool IsGlobalDictionary() const);
   INLINE(bool IsSeededNumberDictionary() const);
   INLINE(bool IsUnseededNumberDictionary() const);
   INLINE(bool IsOrderedHashSet() const);
   INLINE(bool IsOrderedHashMap() const);
   static bool IsPromise(Handle<Object> object);
 
   // Oddball testing.
@@ skipping 9512 matching lines @@
 
   Isolate* isolate_;
   Handle<FixedArray> keys_;
   Handle<OrderedHashSet> set_;
   int length_;
   DISALLOW_COPY_AND_ASSIGN(KeyAccumulator);
 };
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_