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 70eac9913eb0750784f883b18b07f8cea222932e..717c14bd44142c4048251d2665773bf1ec1687ca 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;
@@ -85,6 +86,7 @@ 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) {
@@ -272,6 +274,14 @@ public class LocaleManager {
     }
 
     /**
+     * @return The referral ID to be passed when searching with Yandex as the DSE.
+     */
+    @CalledByNative
+    protected String getYandexReferralId() {

[Yusuf, 2017/05/09 23:18:52]

should this be a static, so that we avoid calling into Java in two separate
methods in the native side? Then we don't have to get the instance etc.

[Ted C, 2017/05/10 15:20:29]

I thought about that as well, but then it would prevent the subclass from
overwriting it as you can do that with statics.

+        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.
      * @param keyword The keyword for the search engine chosen.