Java code for fetching variations first run seed after receiving chrome.TOS_ACKED broadcast.

components/variations/android/java/src/org/chromium/components/variations/firstrun/VariationsSeedBridge.java

Index: components/variations/android/java/src/org/chromium/components/variations/firstrun/VariationsSeedBridge.java
diff --git a/components/variations/android/java/src/org/chromium/components/variations/firstrun/VariationsSeedBridge.java b/components/variations/android/java/src/org/chromium/components/variations/firstrun/VariationsSeedBridge.java
new file mode 100644
index 0000000000000000000000000000000000000000..3a02651b21ab86be70a891139f7dd254c35c3f24
--- /dev/null
+++ b/components/variations/android/java/src/org/chromium/components/variations/firstrun/VariationsSeedBridge.java
@@ -0,0 +1,61 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.components.variations.firstrun;

[newt (away), 2015/11/06 18:27:14]

firstrun could be a confusing package name to other developers since "first run"
has a very specific meaning on Chrome Android: i.e. the code under
org.chromium.chrome.browser.firstrun / the flow that we send users through the
first time they launch Chrome.

This code is really "pre first run", as you mention in the comment below. Not
sure what the best name is though.

+
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.preference.PreferenceManager;
+import android.util.Base64;
+
+import org.chromium.base.annotations.CalledByNative;
+
+/**
+ * VariationsSeedBridge is a class which used to pass variations first run seed that was fetched
+ * before the

[Alexei Svitkine (slow), 2015/11/06 16:17:55]

Nit: Wrapping is off.

[Alexander Agulenko, 2015/11/06 19:54:37]

Done.

+ * actual Chrome first run to Chromium core. Class provides implementation of methods to store the

[newt (away), 2015/11/06 18:27:14]

nit: remove "implementation of"

[Alexander Agulenko, 2015/11/06 19:54:37]

Done.

+ * seed in
+ * SharedPreferences and to get the seed from there. To store raw seed data class serializes byte[]
+ * to
+ * Base64 encoded string and decodes this string before passing to C++ side.
+ */
+

[Alexei Svitkine (slow), 2015/11/06 16:17:55]

Nit: Remove empty line.

[Alexander Agulenko, 2015/11/06 19:54:37]

Done.

+public final class VariationsSeedBridge {
+    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(

[newt (away), 2015/11/06 18:27:14]

javadoc for public methods

[Alexander Agulenko, 2015/11/06 19:54:37]

Done.

+            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);
+    }
+}