Revert of Turn on icu_case_mapping by default (patchset #4 id:60001 of...

Revert of Turn on icu_case_mapping by default (patchset #4 id:60001 of https://codereview.chromium.org/2588963002/ )

Reason for revert:
Causes crashes on Canary: crbug.com/676643

Original issue's description:
> Turn on icu_case_mapping by default
>
> Update string-capitalize expected result because now it
> passes all the tests in the file.
> Mark fast/js/string-capitalization as failing with no_i18n.
>
> Relanding after revert because the failure was taken care of
> by Adam's CL at https://codereview.chromium.org/2597543002 .
>
>
> BUG=v8:4477, v8:4476
> TEST=test262/{built-ins,intl402}/Strings/*, webkit/fast/js/*,
>      mjsunit/string-case, intl/general/case*
>
> Cr-Original-Commit-Position: refs/heads/master@{#41834}
> Committed: https://chromium.googlesource.com/v8/v8/+/7c79e23c34ea971947eedc6e42d8a882617c0e47
> Review-Url: https://codereview.chromium.org/2588963002
> Cr-Commit-Position: refs/heads/master@{#41883}
> Committed: https://chromium.googlesource.com/v8/v8/+/a42c8c67dece5328896b13d37c5c846a2a0f5b0b

TBR=littledan@chromium.org,yangguo@chromium.org,jshin@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=v8:4477, v8:4476, chromium:676643

Review-Url: https://codereview.chromium.org/2601553002
Cr-Commit-Position: refs/heads/master@{#41928}

src/flag-definitions.h

@@ -204,7 +204,7 @@ DEFINE_IMPLICATION(es_staging, move_object_start)
   V(harmony_class_fields, "harmony public fields in class literals")
 
 // Features that are complete (but still behind --harmony/es-staging flag).
-#define HARMONY_STAGED(V)                                   \
+#define HARMONY_STAGED_BASE(V)                              \
   V(harmony_regexp_lookbehind, "harmony regexp lookbehind") \
   V(harmony_restrictive_generators,                         \
     "harmony restrictions on generator declarations")       \
@@ -212,16 +212,23 @@ DEFINE_IMPLICATION(es_staging, move_object_start)
   V(harmony_trailing_commas,                                \
     "harmony trailing commas in function parameter lists")
 
+#ifdef V8_I18N_SUPPORT
+#define HARMONY_STAGED(V)                                          \
+  HARMONY_STAGED_BASE(V)                                           \
+  V(icu_case_mapping, "case mapping with ICU rather than Unibrow")
+#else
+#define HARMONY_STAGED(V) HARMONY_STAGED_BASE(V)
+#endif
+
 // Features that are shipping (turned on by default, but internal flag remains).
 #define HARMONY_SHIPPING_BASE(V)                \
   V(harmony_async_await, "harmony async-await") \
   V(harmony_string_padding, "harmony String-padding methods")
 
 #ifdef V8_I18N_SUPPORT
-#define HARMONY_SHIPPING(V)                                        \
-  HARMONY_SHIPPING_BASE(V)                                         \
-  V(datetime_format_to_parts, "Intl.DateTimeFormat.formatToParts") \
-  V(icu_case_mapping, "case mapping with ICU rather than Unibrow")
+#define HARMONY_SHIPPING(V) \
+  HARMONY_SHIPPING_BASE(V)  \
+  V(datetime_format_to_parts, "Intl.DateTimeFormat.formatToParts")
 #else
 #define HARMONY_SHIPPING(V) HARMONY_SHIPPING_BASE(V)
 #endif

test/webkit/fast/js/string-capitalization-expected.txt

@@ -26,8 +26,8 @@ This test checks that toLowerCase and toUpperCase handle certain non-trivial cas
 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
 
 
-PASS String("A𐐀").toLowerCase() is "a𐐨"
-PASS String("a𐐨").toUpperCase() is "A𐐀"
+FAIL String("A𐐀").toLowerCase() should be a𐐨. Was a𐐀.
+FAIL String("a𐐨").toUpperCase() should be A𐐀. Was A𐐨.
 PASS String("ΚΟΣΜΟΣ ΚΟΣΜΟΣ").toLowerCase() is "κοσμος κοσμος"
 PASS String("ß").toUpperCase() is "SS"
 PASS String("ʼn").toUpperCase() is "ʼN"

test/webkit/webkit.status

@@ -125,10 +125,5 @@
   '*': [SKIP],
 }],  # variant == wasm_traps
 
-##############################################################################
-['no_i18n == True', {
-  'fast/js/string-capitalization': [FAIL],
-}],  # variant == wasm_traps
-
 ##############################################################################
 ]