[M52] Fix android test compile

chrome/android/junit/src/org/chromium/chrome/browser/ChromeBackupAgentTest.java

 // 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;
 
 import static org.hamcrest.CoreMatchers.equalTo;
 import static org.hamcrest.CoreMatchers.nullValue;
 import static org.junit.Assert.assertThat;
 
 import android.accounts.Account;
 import android.accounts.AccountManager;
 import android.content.Context;
 import android.content.SharedPreferences;
 import android.preference.PreferenceManager;
 
+import org.chromium.base.ContextUtils;
 import org.chromium.testing.local.LocalRobolectricTestRunner;
+import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.robolectric.Robolectric;
 import org.robolectric.annotation.Config;
 
 /**
  * Unit tests for {@link org.chromium.chrome.browser.ChromeBackupAgent}.
  */
 @RunWith(LocalRobolectricTestRunner.class)
 @Config(manifest = Config.NONE)
@@ skipping 67 matching lines @@
 
         new ChromeTestBackupAgent().onRestoreFinished();
 
         // Check that we haven't restored any preferences
         assertThat(sharedPrefs.getBoolean("crash_dump_upload", true), equalTo(true));
         assertThat(sharedPrefs.getString("google.services.username", null), nullValue());
         assertThat(sharedPrefs.getString("junk", null), nullValue());
         assertThat(sharedPrefs.getString("first_run_signin_account_name", null), nullValue());
     }
 }