Remove redundant field initialization in Java code.

base/test/android/javatests/src/org/chromium/base/test/util/CallbackHelper.java

 // Copyright 2012 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.base.test.util;
 
 import static org.chromium.base.test.util.ScalableTimeout.scaleTimeout;
 
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.TimeoutException;
@@ skipping 109 matching lines @@
  *      });
  *      operationHelper.waitForCallback(callCount);
  * }
  *
  */
 public class CallbackHelper {
     /** The default timeout (in seconds) for a callback to wait. */
     public static final long WAIT_TIMEOUT_SECONDS = scaleTimeout(5);
 
     private final Object mLock = new Object();
-    private int mCallCount = 0;
+    private int mCallCount;
 
     /**
      * Gets the number of times the callback has been called.
      *
      * The call count can be used with the waitForCallback() method, indicating a point
      * in time after which the caller wishes to record calls to the callback.
      *
      * In order to wait for a callback caused by X, the call count should be obtained
      * before X occurs.
      *
@@ skipping 81 matching lines @@
     /**
      * Should be called when the callback associated with this helper object is called.
      */
     public void notifyCalled() {
         synchronized (mLock) {
             mCallCount++;
             mLock.notifyAll();
         }
     }
 }