Remove redundant field initialization in Java code.

chrome/android/sync_shell/javatests/src/org/chromium/chrome/browser/sync/GmsCoreSyncListenerTest.java

 // 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.chrome.browser.sync;
 
 import android.accounts.Account;
 import android.test.suitebuilder.annotation.MediumTest;
 
 import org.chromium.base.ThreadUtils;
 import org.chromium.base.test.util.Feature;
 import org.chromium.base.test.util.RetryOnFailure;
 import org.chromium.chrome.test.util.browser.sync.SyncTestUtil;
 import org.chromium.content.browser.test.util.Criteria;
 import org.chromium.content.browser.test.util.CriteriaHelper;
 
 import java.util.concurrent.Callable;
 
 /**
  * Test suite for the GmsCoreSyncListener.
  */
 @RetryOnFailure  // crbug.com/637448
 public class GmsCoreSyncListenerTest extends SyncTestBase {
     private static final String PASSPHRASE = "passphrase";
 
     static class CountingGmsCoreSyncListener extends GmsCoreSyncListener {
-        private int mCallCount = 0;
+        private int mCallCount;
 
         @Override
         public void updateEncryptionKey(byte[] key) {
             mCallCount++;
         }
 
         public int callCount() {
             return mCallCount;
         }
     }
@@ skipping 85 matching lines @@
 
     private void waitForCallCount(int count) throws InterruptedException {
         CriteriaHelper.pollUiThread(Criteria.equals(count, new Callable<Integer>() {
             @Override
             public Integer call() {
                 return mListener.callCount();
             }
         }));
     }
 }