Update account and sync management UX

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

Index: chrome/android/java/src/org/chromium/chrome/browser/preferences/SyncPreference.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/preferences/SyncPreference.java b/chrome/android/java/src/org/chromium/chrome/browser/preferences/SyncPreference.java
new file mode 100644
index 0000000000000000000000000000000000000000..d7981f3b9fada62c6cd0389899da8cb1420833e1
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/preferences/SyncPreference.java
@@ -0,0 +1,78 @@
+// Copyright 2016 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.chrome.browser.preferences;
+
+import android.accounts.Account;
+import android.content.Context;
+import android.content.res.Resources;
+import android.preference.Preference;
+import android.util.AttributeSet;
+
+import org.chromium.chrome.R;
+import org.chromium.chrome.browser.childaccounts.ChildAccountService;
+import org.chromium.chrome.browser.sync.GoogleServiceAuthError;
+import org.chromium.chrome.browser.sync.ProfileSyncService;
+import org.chromium.sync.AndroidSyncSettings;
+import org.chromium.sync.signin.ChromeSigninController;
+
+/**
+ * A preference that displays the current sync account and status (enabled, error, needs passphrase,
+ * etc)."
+ */
+public class SyncPreference extends Preference {
+    public SyncPreference(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        updateSyncSummary();
+    }
+
+    /**
+     * Updates the summary for this preference to reflect the current state of syncing.
+     */
+    public void updateSyncSummary() {
+        setSummary(getSyncStatusSummary(getContext()));
+    }
+
+    private static String getSyncStatusSummary(Context context) {
+        if (!ChromeSigninController.get(context).isSignedIn()) return "";
+
+        ProfileSyncService profileSyncService = ProfileSyncService.get();
+        Resources res = context.getResources();
+
+        if (ChildAccountService.isChildAccount()) {
+            return res.getString(R.string.kids_account);
+        }
+
+        if (!AndroidSyncSettings.isMasterSyncEnabled(context)) {
+            return res.getString(R.string.sync_android_master_sync_disabled);
+        }
+
+        if (profileSyncService == null) {
+            return res.getString(R.string.sync_is_disabled);
+        }
+
+        if (profileSyncService.getAuthError() != GoogleServiceAuthError.State.NONE) {
+            return res.getString(profileSyncService.getAuthError().getMessage());
+        }
+
+        if (AndroidSyncSettings.isSyncEnabled(context)) {
+            if (!profileSyncService.isBackendInitialized()) {
+                return res.getString(R.string.sync_setup_progress);
+            }
+
+            if (profileSyncService.isPassphraseRequiredForDecryption()) {
+                return res.getString(R.string.sync_need_passphrase);
+            }
+        }
+
+        boolean syncEnabled = AndroidSyncSettings.isSyncEnabled(context);
+
+        if (syncEnabled) {
+            Account account = ChromeSigninController.get(context).getSignedInUser();
+            return String.format(
+                    context.getString(R.string.account_management_sync_summary), account.name);
+        } else {
+            return context.getString(R.string.sync_is_disabled);
+        }
+    }
+}