Bug 1719554 - Unify unicode::Script as intl::Script; r=platform-i18n-reviewers,gregtatum

Differential Revision: https://phabricator.services.mozilla.com/D132278

layout/generic/nsTextFrame.cpp

@@ -8370,8 +8370,8 @@ static bool FindFirstLetterRange(const nsTextFragment* aFrag,
   // want to allow this to split a ligature.
   bool allowSplitLigature;
 
-  typedef unicode::Script Script;
-  Script script = unicode::GetScriptCode(usv);
+  typedef intl::Script Script;
+  Script script = intl::UnicodeProperties::GetScriptCode(usv);
   switch (script) {
     default:
       allowSplitLigature = true;