Variations seed is pulled from the Java application on the first launch of Chrome

chrome/android/java/src/org/chromium/chrome/browser/preferences/PrefServiceBridge.java

Index: chrome/android/java/src/org/chromium/chrome/browser/preferences/PrefServiceBridge.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/preferences/PrefServiceBridge.java b/chrome/android/java/src/org/chromium/chrome/browser/preferences/PrefServiceBridge.java
index c5c1564f934cc2c01e0cd420b0881b04861c3966..e864e939c3056b7ee08973ef8e61823846734d76 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/preferences/PrefServiceBridge.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/preferences/PrefServiceBridge.java
@@ -7,6 +7,7 @@ package org.chromium.chrome.browser.preferences;
 import android.content.Context;
 import android.content.SharedPreferences;
 import android.preference.PreferenceManager;
+import android.util.Base64;
 import android.util.Log;
 
 import org.chromium.base.ThreadUtils;
@@ -219,6 +220,46 @@ public final class PrefServiceBridge {
         }
     }
 
+    // TODO(agulenko): Move this piece of code to a separate class.
+
+    private static final String VARIATIONS_FIRST_RUN_SEED = "variations_seed";
+    private static final String VARIATIONS_FIRST_RUN_SEED_SIGNATURE = "variations_seed_signature";
+    private static final String VARIATIONS_FIRST_RUN_SEED_COUNTRY = "variations_seed_country";
+
+    private static String getVariationsFirstRunSeedPref(Context context, String prefName) {
+        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
+        return prefs.getString(prefName, new String());
+    }
+
+    private static void setVariationsFirstRunSeedPref(
+            Context context, String prefName, String data) {
+        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
+        prefs.edit().putString(prefName, data).apply();
+    }
+
+    public static void setVariationsFirstRunSeed(
+            Context context, byte[] rawSeed, String signature, String country) {
+        setVariationsFirstRunSeedPref(context, VARIATIONS_FIRST_RUN_SEED,
+                                      Base64.encodeToString(rawSeed, Base64.NO_WRAP));
+        setVariationsFirstRunSeedPref(context, VARIATIONS_FIRST_RUN_SEED_SIGNATURE, signature);
+        setVariationsFirstRunSeedPref(context, VARIATIONS_FIRST_RUN_SEED_COUNTRY, country);
+    }
+
+    @CalledByNative
+    private static String getVariationsFirstRunSeedData(Context context) {
+        return getVariationsFirstRunSeedPref(context, VARIATIONS_FIRST_RUN_SEED);
+    }
+
+    @CalledByNative
+    private static String getVariationsFirstRunSeedSignature(Context context) {
+        return getVariationsFirstRunSeedPref(context, VARIATIONS_FIRST_RUN_SEED_SIGNATURE);
+    }
+
+    @CalledByNative
+    private static String getVariationsFirstRunSeedCountry(Context context) {
+        return getVariationsFirstRunSeedPref(context, VARIATIONS_FIRST_RUN_SEED_COUNTRY);
+    }
+
     public boolean isAcceptCookiesEnabled() {
         return nativeGetAcceptCookiesEnabled();
     }