Support multiple locales string for accept language list

chrome/android/java/src/org/chromium/chrome/browser/physicalweb/PwsClientImpl.java

Index: chrome/android/java/src/org/chromium/chrome/browser/physicalweb/PwsClientImpl.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/physicalweb/PwsClientImpl.java b/chrome/android/java/src/org/chromium/chrome/browser/physicalweb/PwsClientImpl.java
index 2bd35ad4d8e3bba2dd24ddf461955c3a54641e7d..ba5db1d5f94450379a3eb9d561cd2a52d7dd3709 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/physicalweb/PwsClientImpl.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/physicalweb/PwsClientImpl.java
@@ -270,25 +270,29 @@ class PwsClientImpl implements PwsClient {
     @VisibleForTesting
     static String prependToAcceptLanguagesIfNecessary(String locale, String acceptLanguages)
     {
-        if (locale.length() != 5 || locale.charAt(2) != '_') {
-            return acceptLanguages;
-        }
+        String[] locales = locale.split(",");
+        Formatter parts = new Formatter();
+        for (String l : locales) {
+            if (l.length() != 5 || l.charAt(2) != '_') {
+                continue;
+            }
 
-        String language = locale.substring(0, 2);
-        String region = locale.substring(3);
-        String languageTag = makeLanguageTag(language, region);
+            String language = l.substring(0, 2);
+            String region = l.substring(3);
+            String languageTag = makeLanguageTag(language, region);
 
-        if (acceptLanguages.contains(languageTag)) {
-            return acceptLanguages;
-        }
+            if (acceptLanguages.contains(languageTag)) {
+                continue;
+            }
 
-        Formatter parts = new Formatter();
-        parts.format("%s,", languageTag);
-        // If language is not in the accept languages list, also add language code.
-        // This will work with the IDS_ACCEPT_LANGUAGES localized strings bundled with Chrome but
-        // may fail on arbitrary lists of language tags due to differences in case and whitespace.
-        if (!acceptLanguages.contains(language + ",") && !acceptLanguages.endsWith(language)) {
-            parts.format("%s,", language);
+            parts.format("%s,", languageTag);
+            // If language is not in the accept languages list, also add language code.
+            // This will work with the IDS_ACCEPT_LANGUAGES localized strings bundled with Chrome
+            // but may fail on arbitrary lists of language tags due to differences in case and
+            // whitespace.
+            if (!acceptLanguages.contains(language + ",") && !acceptLanguages.endsWith(language)) {
+                parts.format("%s,", language);
+            }
         }
         parts.format("%s", acceptLanguages);
         return parts.toString();