Ship import assertions

Blink has shipped import assertions since M91, so it is safe enough to
go straight to shipping here.

Bug: v8:10958
Change-Id: I3256172473a1ae8ce74e7fa63b14137e24568360
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3911378Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Shu-yu Guo <syg@chromium.org>
Cr-Commit-Position: refs/heads/main@{#83373}

src/flags/flag-definitions.h

@@ -225,7 +225,6 @@ DEFINE_BOOL(harmony_shipping, true, "enable all shipped harmony features")
 #define HARMONY_INPROGRESS_BASE(V)                                             \
   V(harmony_weak_refs_with_cleanup_some,                                       \
     "harmony weak references with FinalizationRegistry.prototype.cleanupSome") \
-  V(harmony_import_assertions, "harmony import assertions")                    \
   V(harmony_temporal, "Temporal")                                              \
   V(harmony_shadow_realm, "harmony ShadowRealm")                               \
   V(harmony_struct, "harmony structs, shared structs, and shared arrays")      \
@@ -258,7 +257,8 @@ DEFINE_BOOL(harmony_shipping, true, "enable all shipped harmony features")
   V(harmony_sharedarraybuffer, "harmony sharedarraybuffer")           \
   V(harmony_atomics, "harmony atomics")                               \
   V(harmony_class_static_blocks, "harmony static initializer blocks") \
-  V(harmony_array_find_last, "harmony array find last helpers")
+  V(harmony_array_find_last, "harmony array find last helpers")       \
+  V(harmony_import_assertions, "harmony import assertions")
 
 #ifdef V8_INTL_SUPPORT
 #define HARMONY_SHIPPING(V) \

test/unittests/parser/parsing-unittest.cc

@@ -4701,9 +4701,8 @@ TEST_F(ParsingTest, ImportExpressionErrors) {
       "import{",
       "import{x",
       "import{x}",
-      "import(x, y)",
+      "import(x, y, z)",
       "import(...y)",
-      "import(x,)",
       "import(,)",
       "import(,y)",
       "import(;)",