Update account and sync management UX

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

Index: chrome/android/java/src/org/chromium/chrome/browser/preferences/SyncedAccountPreference.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/preferences/SyncedAccountPreference.java b/chrome/android/java/src/org/chromium/chrome/browser/preferences/SyncedAccountPreference.java
new file mode 100644
index 0000000000000000000000000000000000000000..9a7f8ff9fe92613900b8c53c4bca72bec681b0fb
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/preferences/SyncedAccountPreference.java
@@ -0,0 +1,69 @@
+// 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.preference.ListPreference;
+import android.text.TextUtils;
+import android.util.AttributeSet;
+
+import org.chromium.chrome.R;
+import org.chromium.sync.AndroidSyncSettings;
+import org.chromium.sync.signin.AccountManagerHelper;
+import org.chromium.sync.signin.ChromeSigninController;
+
+/**
+ * A preference that displays the account currently being synced and allows the user to choose a new
+ * account to use for syncing
+ */
+public class SyncedAccountPreference extends ListPreference {
+
+    /**
+     * Constructor for inflating from XML
+     */
+    public SyncedAccountPreference(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        setTitle(context.getResources().getString(R.string.sync_to_account_header));
+        updateAccountsList();
+    }
+
+    private void updateAccountsList() {
+        boolean syncEnabled = AndroidSyncSettings.isSyncEnabled(getContext());
+        if (!syncEnabled) {
+            setEnabled(false);
+            return;
+        }
+
+        Account[] accounts = AccountManagerHelper.get(getContext()).getGoogleAccounts();
+        String[] accountNames = new String[accounts.length];
+        String[] accountValues = new String[accounts.length];
+
+        String signedInAccountName =
+                ChromeSigninController.get(getContext()).getSignedInAccountName();
+        String signedInSettingsKey = "";
+
+        for (int i = 0; i < accounts.length; ++i) {
+            Account account = accounts[i];
+            accountNames[i] = account.name;
+            accountValues[i] = account.name;
+            boolean isPrimaryAccount = TextUtils.equals(account.name, signedInAccountName);
+            if (isPrimaryAccount) {
+                signedInSettingsKey = accountValues[i];
+            }
+        }
+
+        setEntries(accountNames);
+        setEntryValues(accountValues);
+        setDefaultValue(signedInSettingsKey);
+        setSummary(signedInAccountName);
+    }
+
+    @Override
+    protected void onDialogClosed(boolean positiveResult) {
+        super.onDialogClosed(positiveResult);
+        // TODO(crbug/557786): Add switching sync accounts
+    }
+}