Use EmojiFoctory::GetShiftJisConverterName() instead of relying on static string.

This change should be with the change Iccbef288.

Bug: 2327318
Change-Id: Ie67d6c1ef60d8e57784e903e3e00a73d3bec0f82
diff --git a/WebKit/android/icu/unicode/ucnv.cpp b/WebKit/android/icu/unicode/ucnv.cpp
index 1963dd2..1b40573 100644
--- a/WebKit/android/icu/unicode/ucnv.cpp
+++ b/WebKit/android/icu/unicode/ucnv.cpp
@@ -40,8 +40,9 @@
 U_STABLE UConverter* U_EXPORT2
 ucnv_open_emoji(const char *converterName, UErrorCode *err) {
     if (EmojiFont::IsAvailable()) {
-        if (strcmp(converterName, "Shift_JIS") == 0)
-            converterName = "docomo-emoji";
+        if (strcmp(converterName, "Shift_JIS") == 0) {
+            converterName = EmojiFont::GetShiftJisConverterName();
+        }
     }
     return ucnv_open(converterName, err);
 }