Fix scriptCodeForHanFromSubtags() may return non-Han scripts

third_party/WebKit/Source/platform/LayoutLocaleTest.cpp

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "platform/LayoutLocale.h"
 
 #include "platform/Logging.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace blink {
@@ skipping 23 matching lines @@
     // Test combinations of BCP 47 locales.
     // https://tools.ietf.org/html/bcp47
     struct {
         const char* locale;
         UScriptCode script;
         bool hasScriptForHan;
         UScriptCode scriptForHan;
     } tests[] = {
         { "en-US", USCRIPT_LATIN },
 
+        // Common lang-script.
+        { "en-Latn", USCRIPT_LATIN },
+        { "ar-Arab", USCRIPT_ARABIC },
+
         // Common lang-region in East Asia.
         { "ja-JP", USCRIPT_KATAKANA_OR_HIRAGANA, true },
         { "ko-KR", USCRIPT_HANGUL, true },
         { "zh", USCRIPT_SIMPLIFIED_HAN, true },
         { "zh-CN", USCRIPT_SIMPLIFIED_HAN, true },
         { "zh-HK", USCRIPT_TRADITIONAL_HAN, true },
         { "zh-MO", USCRIPT_TRADITIONAL_HAN, true },
         { "zh-SG", USCRIPT_SIMPLIFIED_HAN, true },
         { "zh-TW", USCRIPT_TRADITIONAL_HAN, true },
 
@@ skipping 49 matching lines @@
         if (!test.hasScriptForHan)
             EXPECT_EQ(USCRIPT_SIMPLIFIED_HAN, locale->scriptForHan()) << test.locale;
         else if (test.scriptForHan)
             EXPECT_EQ(test.scriptForHan, locale->scriptForHan()) << test.locale;
         else
             EXPECT_EQ(test.script, locale->scriptForHan()) << test.locale;
     }
 }
 
 } // namespace blink