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..df3d8bb8bcfcaab9379d567d21321cd5df2c0294 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 +220,45 @@ public final class PrefServiceBridge {
         }
     }
 
+    // TODO(agulenko): Move this piece of code to a separate class.
+
+    private static final String VARIATIONS_FIRST_RUN_SEED_BASE64 = "variations_seed_base64";
+    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, "");
+    }
+
+    public static void setVariationsFirstRunSeed(
+            Context context, byte[] rawSeed, String signature, String country) {
+        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
+        prefs.edit()
+                .putString(VARIATIONS_FIRST_RUN_SEED_BASE64,
+                        Base64.encodeToString(rawSeed, Base64.NO_WRAP))
+                .putString(VARIATIONS_FIRST_RUN_SEED_SIGNATURE, signature)
+                .putString(VARIATIONS_FIRST_RUN_SEED_COUNTRY, country)
+                .apply();
+    }
+
+    @CalledByNative
+    private static byte[] getVariationsFirstRunSeedData(Context context) {
+        return Base64.decode(
+                getVariationsFirstRunSeedPref(context, VARIATIONS_FIRST_RUN_SEED_BASE64),
+                Base64.NO_WRAP);
+    }
+
+    @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();
     }