Use BCP47 compliant format for locale representation

base/android/javatests/src/org/chromium/base/LocaleUtilsTest.java

Index: base/android/javatests/src/org/chromium/base/LocaleUtilsTest.java
diff --git a/base/android/javatests/src/org/chromium/base/LocaleUtilsTest.java b/base/android/javatests/src/org/chromium/base/LocaleUtilsTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..c9e7e07d1e66ab9f69e9ffd877f3ccc19e8fc688
--- /dev/null
+++ b/base/android/javatests/src/org/chromium/base/LocaleUtilsTest.java
@@ -0,0 +1,70 @@
+// 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.
+
+package org.chromium.base;
+
+import android.test.InstrumentationTestCase;
+import android.test.suitebuilder.annotation.SmallTest;
+
+import java.util.Locale;
+
+/**
+ * Tests for the LocaleUtils class.
+ */
+public class LocaleUtilsTest extends InstrumentationTestCase {
+    private LocaleUtils mLocaleUtils;
+
+    // TODO(yirui): update tests for a locale list when SDK Roll is ready
+    // This is also a test for toLanguageTagCompat() while the API level is lower
+    // than 21.
+    @SmallTest
+    public void testGetLocale() {
+        Locale locale = new Locale("en", "US");
+        String localeString = LocaleUtils.getLocale(locale);
+        assertEquals("en-US", localeString);
+
+        locale = new Locale("jp");
+        localeString = LocaleUtils.getLocale(locale);
+        assertEquals("jp", localeString);
+
+        locale = new Locale("iw");
+        localeString = LocaleUtils.getLocale(locale);
+        assertEquals("he", localeString);
+
+        locale = new Locale("ji");
+        localeString = LocaleUtils.getLocale(locale);
+        assertEquals("yi", localeString);
+
+        locale = new Locale("in");
+        localeString = LocaleUtils.getLocale(locale);
+        assertEquals("id", localeString);
+
+        locale = new Locale("tl");
+        localeString = LocaleUtils.getLocale(locale);
+        assertEquals("fil", localeString);
+    }
+
+    @SmallTest
+    public void testForLanguageTagCompat() {
+        String languageTag = "";
+        Locale locale = new Locale("");
+        assertEquals(locale, LocaleUtils.forLanguageTagCompat(languageTag));
+
+        languageTag = "en";
+        locale = new Locale("en");
+        assertEquals(locale, LocaleUtils.forLanguageTagCompat(languageTag));
+
+        languageTag = "mas";
+        locale = new Locale("mas");
+        assertEquals(locale, LocaleUtils.forLanguageTagCompat(languageTag));
+
+        languageTag = "en-GB";
+        locale = new Locale("en", "GB");
+        assertEquals(locale, LocaleUtils.forLanguageTagCompat(languageTag));
+
+        languageTag = "es-419";
+        locale = new Locale("es", "419");
+        assertEquals(locale, LocaleUtils.forLanguageTagCompat(languageTag));
+    }
+}