Store JSGlobalProxy's identity hash directly on the proxy itself

src/objects-inl.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 5047 matching lines @@
 ACCESSORS(JSFunction, shared, SharedFunctionInfo, kSharedFunctionInfoOffset)
 ACCESSORS(JSFunction, literals_or_bindings, FixedArray, kLiteralsOffset)
 ACCESSORS(JSFunction, next_function_link, Object, kNextFunctionLinkOffset)
 
 ACCESSORS(GlobalObject, builtins, JSBuiltinsObject, kBuiltinsOffset)
 ACCESSORS(GlobalObject, native_context, Context, kNativeContextOffset)
 ACCESSORS(GlobalObject, global_context, Context, kGlobalContextOffset)
 ACCESSORS(GlobalObject, global_receiver, JSObject, kGlobalReceiverOffset)
 
 ACCESSORS(JSGlobalProxy, native_context, Object, kNativeContextOffset)
+ACCESSORS(JSGlobalProxy, hash, Object, kHashOffset)
 
 ACCESSORS(AccessorInfo, name, Object, kNameOffset)
 ACCESSORS_TO_SMI(AccessorInfo, flag, kFlagOffset)
 ACCESSORS(AccessorInfo, expected_receiver_type, Object,
           kExpectedReceiverTypeOffset)
 
 ACCESSORS(DeclaredAccessorDescriptor, serialized_data, ByteArray,
           kSerializedDataOffset)
 
 ACCESSORS(DeclaredAccessorInfo, descriptor, DeclaredAccessorDescriptor,
@@ skipping 1941 matching lines @@
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 #undef NOBARRIER_READ_BYTE_FIELD
 #undef NOBARRIER_WRITE_BYTE_FIELD
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_