https://bugs.gentoo.org/917645
(copied patch from qtwebengine:6 - https://bugs.gentoo.org/917633)

Quick fix for a static_assert failure with icu74. Still waiting
for a proper upstream fix and unknown if entirely right, but is
an extension of [1] (is now 48 rather than 43).

[1] https://crrev.com/e60b571faa3f14dd9119a6792dccf12f8bf80192
--- a/third_party/blink/renderer/platform/text/text_break_iterator.cc
+++ b/third_party/blink/renderer/platform/text/text_break_iterator.cc
@@ -161,7 +161,9 @@ static const unsigned char kAsciiLineBreakTable[][(kAsciiLineBreakTableLastChar
 };
 // clang-format on
 
-#if U_ICU_VERSION_MAJOR_NUM >= 58
+#if U_ICU_VERSION_MAJOR_NUM >= 74
+#define BA_LB_COUNT (U_LB_COUNT - 8)
+#elif U_ICU_VERSION_MAJOR_NUM >= 58
 #define BA_LB_COUNT (U_LB_COUNT - 3)
 #else
 #define BA_LB_COUNT U_LB_COUNT