Add Yandex referral ID to search URL.

chrome/android/java/src/org/chromium/chrome/browser/locale/LocaleManager.java

Index: chrome/android/java/src/org/chromium/chrome/browser/locale/LocaleManager.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/locale/LocaleManager.java b/chrome/android/java/src/org/chromium/chrome/browser/locale/LocaleManager.java
index 7643090c39bb4e186423bd2ca02e03abbdba9d95..06f2f9c6cc025702de1d6c677f7ad9b60a396783 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/locale/LocaleManager.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/locale/LocaleManager.java
@@ -14,6 +14,7 @@ import org.chromium.base.Callback;
 import org.chromium.base.ContextUtils;
 import org.chromium.base.ThreadUtils;
 import org.chromium.base.VisibleForTesting;
+import org.chromium.base.annotations.CalledByNative;
 import org.chromium.chrome.R;
 import org.chromium.chrome.browser.AppHooks;
 import org.chromium.chrome.browser.ChromeFeatureList;
@@ -87,6 +88,7 @@ public class LocaleManager {
     /**
      * @return An instance of the {@link LocaleManager}. This should only be called on UI thread.
      */
+    @CalledByNative
     public static LocaleManager getInstance() {
         assert ThreadUtils.runningOnUiThread();
         if (sInstance == null) {
@@ -273,6 +275,14 @@ public class LocaleManager {
         return SEARCH_ENGINE_PROMO_SHOW_SOGOU;
     }
 
+    /**
+     * @return The referral ID to be passed when searching with Yandex as the DSE.
+     */
+    @CalledByNative
+    protected String getYandexReferralId() {
+        return "";
+    }
+
     /**
      * To be called after the user has made a selection from a search engine promo dialog.
      * @param type The type of search engine promo dialog that was shown.