[Interpreter] Use FastCloneShallowObjectStub in CreateObjectLiteral bytecode.

src/code-stubs.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_CODE_STUBS_H_
 #define V8_CODE_STUBS_H_
 
 #include "src/allocation.h"
 #include "src/assembler.h"
 #include "src/code-stub-assembler.h"
@@ skipping 1128 matching lines @@
   // Maximum number of properties in copied object.
   static const int kMaximumClonedProperties = 6;
 
   FastCloneShallowObjectStub(Isolate* isolate, int length)
       : TurboFanCodeStub(isolate) {
     DCHECK_GE(length, 0);
     DCHECK_LE(length, kMaximumClonedProperties);
     minor_key_ = LengthBits::encode(LengthBits::encode(length));
   }
 
+  static compiler::Node* GenerateFastPath(
+      CodeStubAssembler* assembler,
+      compiler::CodeAssembler::Label* call_runtime, compiler::Node* closure,
+      compiler::Node* literals_index, compiler::Node* properties_count);
+
+  static bool IsSupported(ObjectLiteral* expr);
+  static int PropertiesCount(int literal_length);
+
   int length() const { return LengthBits::decode(minor_key_); }
 
  private:
   class LengthBits : public BitField<int, 0, 4> {};
 
   DEFINE_CALL_INTERFACE_DESCRIPTOR(FastCloneShallowObject);
   DEFINE_TURBOFAN_CODE_STUB(FastCloneShallowObject, TurboFanCodeStub);
 };
 
 
@@ skipping 2047 matching lines @@
 #undef DEFINE_HYDROGEN_CODE_STUB
 #undef DEFINE_CODE_STUB
 #undef DEFINE_CODE_STUB_BASE
 
 extern Representation RepresentationFromType(Type* type);
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CODE_STUBS_H_