Change the system font fallback to take lang attributes into account on Windows

third_party/WebKit/Source/platform/fonts/win/FontFallbackWinTest.cpp

 // Copyright 2015 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/fonts/win/FontFallbackWin.h"
 
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace blink {
 
@@ skipping 18 matching lines @@
     EXPECT_EQ(USCRIPT_HIRAGANA, scriptCodeForUnifiedHanFromLocale(
         icu::Locale("ja", "US")));
     EXPECT_EQ(USCRIPT_HANGUL, scriptCodeForUnifiedHanFromLocale(
         icu::Locale("ko")));
     EXPECT_EQ(USCRIPT_HANGUL, scriptCodeForUnifiedHanFromLocale(
         icu::Locale("ko", "US")));
     EXPECT_EQ(USCRIPT_TRADITIONAL_HAN, scriptCodeForUnifiedHanFromLocale(
         icu::Locale("zh", "hant")));
 }
 
+TEST(FontFallbackWinTest, scriptCodeForUnifiedHanFromSubtagsTest)
+{
+    EXPECT_EQ(USCRIPT_SIMPLIFIED_HAN,
+        scriptCodeForUnifiedHanFromSubtags("en-CN"));
+    EXPECT_EQ(USCRIPT_HIRAGANA, scriptCodeForUnifiedHanFromSubtags("en-JP"));
+    EXPECT_EQ(USCRIPT_HANGUL, scriptCodeForUnifiedHanFromSubtags("en-KR"));
+    EXPECT_EQ(USCRIPT_TRADITIONAL_HAN,
+        scriptCodeForUnifiedHanFromSubtags("en-HK"));
+    EXPECT_EQ(USCRIPT_TRADITIONAL_HAN,
+        scriptCodeForUnifiedHanFromSubtags("en-TW"));
+
+    EXPECT_EQ(USCRIPT_SIMPLIFIED_HAN,
+        scriptCodeForUnifiedHanFromSubtags("en-HanS"));
+    EXPECT_EQ(USCRIPT_TRADITIONAL_HAN,
+        scriptCodeForUnifiedHanFromSubtags("en-HanT"));
+
+    EXPECT_EQ(USCRIPT_SIMPLIFIED_HAN,
+        scriptCodeForUnifiedHanFromSubtags("en-HanS-JP"));
+    EXPECT_EQ(USCRIPT_TRADITIONAL_HAN,
+        scriptCodeForUnifiedHanFromSubtags("en-HanT-JP"));
+
+    EXPECT_EQ(USCRIPT_HAN, scriptCodeForUnifiedHanFromSubtags("en-US"));
+}
+
 } // namespace blink