[cleanup] Move object lists macros and forward declarations from objects.h

... to a separate file.

Bug: v8:9183
Change-Id: I87f98ed0fec84eb32403c3447bec7be50a79261d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1588095Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61094}

BUILD.gn

@@ -2512,6 +2512,7 @@ v8_source_set("v8_base_without_compiler") {
     "src/objects/module.h",
     "src/objects/name-inl.h",
     "src/objects/name.h",
+    "src/objects/object-list-macros.h",
     "src/objects/object-macros-undef.h",
     "src/objects/object-macros.h",
     "src/objects/oddball-inl.h",

src/objects/object-macros-undef.h

@@ -57,8 +57,10 @@
 #undef RELAXED_WRITE_WEAK_FIELD
 #undef WRITE_BARRIER
 #undef WEAK_WRITE_BARRIER
+#undef EPHEMERON_KEY_WRITE_BARRIER
 #undef CONDITIONAL_WRITE_BARRIER
 #undef CONDITIONAL_WEAK_WRITE_BARRIER
+#undef CONDITIONAL_EPHEMERON_KEY_WRITE_BARRIER
 #undef READ_DOUBLE_FIELD
 #undef WRITE_DOUBLE_FIELD
 #undef READ_INT_FIELD
@@ -97,6 +99,8 @@
 #undef RELAXED_READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 #undef RELAXED_WRITE_BYTE_FIELD
+#undef DECL_PRINTER
 #undef DECL_VERIFIER
+#undef EXPORT_DECL_VERIFIER
 #undef DEFINE_DEOPT_ELEMENT_ACCESSORS
 #undef DEFINE_DEOPT_ENTRY_ACCESSORS

src/objects/object-macros.h

@@ -493,6 +493,12 @@
   base::Relaxed_Store(reinterpret_cast<base::Atomic8*>(FIELD_ADDR(p, offset)), \
                       static_cast<base::Atomic8>(value));
 
+#ifdef OBJECT_PRINT
+#define DECL_PRINTER(Name) void Name##Print(std::ostream& os);  // NOLINT
+#else
+#define DECL_PRINTER(Name)
+#endif
+
 #ifdef VERIFY_HEAP
 #define DECL_VERIFIER(Name) void Name##Verify(Isolate* isolate);
 #define EXPORT_DECL_VERIFIER(Name) \