Roll harfbuzz-ng to 1.0.5

third_party/harfbuzz-ng/src/hb-ot-tag.cc

Index: third_party/harfbuzz-ng/src/hb-ot-tag.cc
diff --git a/third_party/harfbuzz-ng/src/hb-ot-tag.cc b/third_party/harfbuzz-ng/src/hb-ot-tag.cc
index 61c38b196262cf1f5f31c245e8018a0f5dfe6539..a2e5728fcd83330ac3a46e6c42c259500bbd1dd7 100644
--- a/third_party/harfbuzz-ng/src/hb-ot-tag.cc
+++ b/third_party/harfbuzz-ng/src/hb-ot-tag.cc
@@ -733,7 +733,6 @@ static const LangTag ot_languages[] = {
 /*{"fuf?",	HB_TAG('F','T','A',' ')},*/	/* Futa */
 /*{"ar-Syrc?",	HB_TAG('G','A','R',' ')},*/	/* Garshuni */
 /*{"cfm/rnl?",	HB_TAG('H','A','L',' ')},*/	/* Halam */
-/*{"fonipa",	HB_TAG('I','P','P','H')},*/	/* Phonetic transcription—IPA conventions */
 /*{"ga-Latg?/Latg?",	HB_TAG('I','R','T',' ')},*/	/* Irish Traditional */
 /*{"krc",	HB_TAG('K','A','R',' ')},*/	/* Karachay */
 /*{"alw?/ktb?",	HB_TAG('K','E','B',' ')},*/	/* Kebena */
@@ -832,6 +831,14 @@ hb_ot_tag_from_language (hb_language_t language)
     }
   }
 
+  /*
+   * The International Phonetic Alphabet is a variant tag in BCP-47,
+   * which can be applied to any language.
+   */
+  if (strstr (lang_str, "-fonipa")) {
+    return HB_TAG('I','P','P','H');  /* Phonetic transcription—IPA conventions */
+  }
+
   /* Find a language matching in the first component */
   {
     const LangTag *lang_tag;
@@ -877,7 +884,7 @@ hb_ot_tag_from_language (hb_language_t language)
  *
  * Return value: (transfer none):
  *
- * Since: 1.0
+ * Since: 0.9.2
  **/
 hb_language_t
 hb_ot_tag_to_language (hb_tag_t tag)
@@ -901,6 +908,12 @@ hb_ot_tag_to_language (hb_tag_t tag)
     }
   }
 
+  /* struct LangTag has only room for 3-letter language tags. */
+  switch (tag) {
+  case HB_TAG('I','P','P','H'):  /* Phonetic transcription—IPA conventions */
+    return hb_language_from_string ("und-fonipa", -1);
+  }
+
   /* Else return a custom language in the form of "x-hbotABCD" */
   {
     unsigned char buf[11] = "x-hbot";