Remove redundant field initialization in Java code.

chrome/android/java/src/org/chromium/chrome/browser/customtabs/SeparateTaskManagedCustomTabActivity.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.customtabs;
 
 import android.content.Intent;
 import android.os.SystemClock;
 
 import org.chromium.chrome.browser.IntentHandler.IntentHandlerDelegate;
 import org.chromium.chrome.browser.IntentHandler.TabOpenType;
 import org.chromium.chrome.browser.tab.Tab;
 import org.chromium.chrome.browser.tabmodel.ChromeTabCreator;
 import org.chromium.chrome.browser.tabmodel.TabModel;
 import org.chromium.chrome.browser.webapps.ActivityAssigner;
 
 /**
  * Manages the state of separate task Custom Tabs for Android versions prior to L.
  *
  * L provides the ability to force tasks to be in separate stacks via the NEW_DOCUMENT flag, but
  * no corresponding flag is available in KitKat and before.  To work around this, we predefine an
  * limited number of activities that we will cycle through.
  */
 public class SeparateTaskManagedCustomTabActivity extends SeparateTaskCustomTabActivity {
     private static final String FORCE_FINISH = "CCT.ForceFinish";
 
     // Time at which an intent was received and handled.
-    private long mIntentHandlingTimeMs = 0;
+    private long mIntentHandlingTimeMs;
 
     @Override
     public void onStartWithNative() {
         super.onStartWithNative();
 
         if (!isFinishing()) {
             ActivityAssigner.instance(ActivityAssigner.SEPARATE_TASK_CCT_NAMESPACE)
                     .markActivityUsed(getActivityIndex(), getIntent().getData().getAuthority());
         }
     }
@@ skipping 50 matching lines @@
 
     @Override
     protected void handleFinishAndClose() {
         Intent intent = new Intent(getIntent());
         intent.setFlags(intent.getFlags() & ~Intent.FLAG_ACTIVITY_NEW_TASK);
         intent.addFlags(Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);
         intent.putExtra(FORCE_FINISH, true);
         startActivity(intent);
     }
 }