[weakrefs] Ship WeakRef and FinalizationRegistry.

I2S: https://groups.google.com/a/chromium.org/g/blink-dev/c/L04PqDk9eMU
Bug: v8:8179
Change-Id: I52aaa62cdab981b802fa4a986d60421ef6efcfbb
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2158371
Commit-Queue: Shu-yu Guo <syg@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67295}

src/flags/flag-definitions.h

@@ -217,7 +217,6 @@ DEFINE_IMPLICATION(harmony_weak_refs_with_cleanup_some, harmony_weak_refs)
   V(harmony_promise_any, "harmony Promise.any")                                \
   V(harmony_string_replaceall, "harmony String.prototype.replaceAll")          \
   V(harmony_regexp_sequence, "RegExp Unicode sequence properties")             \
-  V(harmony_weak_refs, "harmony weak references")                              \
   V(harmony_weak_refs_with_cleanup_some,                                       \
     "harmony weak references with FinalizationRegistry.prototype.cleanupSome") \
   V(harmony_regexp_match_indices, "harmony regexp match indices")              \
@@ -247,14 +246,15 @@ DEFINE_IMPLICATION(harmony_weak_refs_with_cleanup_some, harmony_weak_refs)
 #endif
 
 // Features that are shipping (turned on by default, but internal flag remains).
-#define HARMONY_SHIPPING_BASE(V)                                   \
-  V(harmony_namespace_exports,                                     \
-    "harmony namespace exports (export * as foo from 'bar')")      \
-  V(harmony_sharedarraybuffer, "harmony sharedarraybuffer")        \
-  V(harmony_import_meta, "harmony import.meta property")           \
-  V(harmony_dynamic_import, "harmony dynamic import")              \
-  V(harmony_promise_all_settled, "harmony Promise.allSettled")     \
-  V(harmony_private_methods, "harmony private methods in class literals")
+#define HARMONY_SHIPPING_BASE(V)                                          \
+  V(harmony_namespace_exports,                                            \
+    "harmony namespace exports (export * as foo from 'bar')")             \
+  V(harmony_sharedarraybuffer, "harmony sharedarraybuffer")               \
+  V(harmony_import_meta, "harmony import.meta property")                  \
+  V(harmony_dynamic_import, "harmony dynamic import")                     \
+  V(harmony_promise_all_settled, "harmony Promise.allSettled")            \
+  V(harmony_private_methods, "harmony private methods in class literals") \
+  V(harmony_weak_refs, "harmony weak references")
 
 #ifdef V8_INTL_SUPPORT
 #define HARMONY_SHIPPING(V)                               \

src/init/bootstrapper.cc

@@ -3944,9 +3944,12 @@ Handle<JSFunction> Genesis::InstallTypedArray(const char* name,
 void Genesis::InitializeExperimentalGlobal() {
 #define FEATURE_INITIALIZE_GLOBAL(id, descr) InitializeGlobal_##id();
 
-  HARMONY_INPROGRESS(FEATURE_INITIALIZE_GLOBAL)
-  HARMONY_STAGED(FEATURE_INITIALIZE_GLOBAL)
+  // Initialize features from more mature to less mature, because less mature
+  // features may depend on more mature features having been initialized
+  // already.
   HARMONY_SHIPPING(FEATURE_INITIALIZE_GLOBAL)
+  HARMONY_STAGED(FEATURE_INITIALIZE_GLOBAL)
+  HARMONY_INPROGRESS(FEATURE_INITIALIZE_GLOBAL)
 #undef FEATURE_INITIALIZE_GLOBAL
 }