[builtins] HasOwnProperty: handle non-internalized string keys

src/objects/string-table.h

 // Copyright 2017 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_STRING_TABLE_H_
 #define V8_OBJECTS_STRING_TABLE_H_
 
 #include "src/objects/hash-table.h"
 
 // Has to be the last include (doesn't have include guards):
@@ skipping 40 matching lines @@
   // or an empty handle otherwise.
   MUST_USE_RESULT static MaybeHandle<String> InternalizeStringIfExists(
       Isolate* isolate, Handle<String> string);
 
   // Looks up a string that is equal to the given string and returns
   // string handle if it is found, or an empty handle otherwise.
   MUST_USE_RESULT static MaybeHandle<String> LookupStringIfExists(
       Isolate* isolate, Handle<String> str);
   MUST_USE_RESULT static MaybeHandle<String> LookupTwoCharsStringIfExists(
       Isolate* isolate, uint16_t c1, uint16_t c2);
+  static Object* LookupStringIfExists_NoAllocate(String* string);
 
   static void EnsureCapacityForDeserialization(Isolate* isolate, int expected);
 
   DECLARE_CAST(StringTable)
 
  private:
   template <bool seq_one_byte>
   friend class JsonParser;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(StringTable);
@@ skipping 18 matching lines @@
 
   DECLARE_CAST(StringSet)
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #include "src/objects/object-macros-undef.h"
 
 #endif  // V8_OBJECTS_STRING_TABLE_H_