Reland of [stubs] KeyedStoreGeneric: inline dictionary property stores

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 <memory>
 
@@ skipping 3833 matching lines @@
                                              int* entry_out = nullptr);
 
   // Returns iteration indices array for the |dictionary|.
   // Values are direct indices in the |HashTable| array.
   static Handle<FixedArray> BuildIterationIndicesArray(
       Handle<Derived> dictionary);
 
   static const int kMaxNumberKeyIndex = DerivedHashTable::kPrefixStartIndex;
   static const int kNextEnumerationIndexIndex = kMaxNumberKeyIndex + 1;
 
+  static const bool kIsEnumerable = Shape::kIsEnumerable;
+
  protected:
   // Generic at put operation.
   MUST_USE_RESULT static Handle<Derived> AtPut(
       Handle<Derived> dictionary,
       Key key,
       Handle<Object> value);
   // Add entry to dictionary. Returns entry value.
   static int AddEntry(Handle<Derived> dictionary, Key key, Handle<Object> value,
                       PropertyDetails details, uint32_t hash);
   // Generate new enumeration indices to avoid enumeration index overflow.
@@ skipping 5724 matching lines @@
 
   // Dispatched behavior.
   DECLARE_PRINTER(Symbol)
   DECLARE_VERIFIER(Symbol)
 
   // Layout description.
   static const int kNameOffset = Name::kSize;
   static const int kFlagsOffset = kNameOffset + kPointerSize;
   static const int kSize = kFlagsOffset + kPointerSize;
 
+  // Flags layout.
+  static const int kPrivateBit = 0;
+  static const int kWellKnownSymbolBit = 1;
+
   typedef FixedBodyDescriptor<kNameOffset, kFlagsOffset, kSize> BodyDescriptor;
 
   void SymbolShortPrint(std::ostream& os);
 
  private:
-  static const int kPrivateBit = 0;
-  static const int kWellKnownSymbolBit = 1;
-
   const char* PrivateSymbolToName() const;
 
 #if TRACE_MAPS
   friend class Name;  // For PrivateSymbolToName.
 #endif
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(Symbol);
 };
 
 
@@ skipping 2262 matching lines @@
     }
     return value;
   }
 };
 
 
 }  // NOLINT, false-positive due to second-order macros.
 }  // NOLINT, false-positive due to second-order macros.
 
 #endif  // V8_OBJECTS_H_