Remove redundant field initialization in Java code.

chrome/android/java/src/org/chromium/chrome/browser/DevToolsServer.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.chrome.browser;
 
 import android.content.Context;
 import android.content.pm.PackageManager;
 
 import org.chromium.base.ApiCompatibilityUtils;
 import org.chromium.base.annotations.CalledByNative;
 
 /**
  * Controller for Remote Web Debugging (Developer Tools).
  */
 public class DevToolsServer {
     private static final String DEBUG_PERMISSION_SIFFIX = ".permission.DEBUG";
 
-    private long mNativeDevToolsServer = 0;
+    private long mNativeDevToolsServer;
 
     // Defines what processes may access to the socket.
     public enum Security {
         // Use content::CanUserConnectToDevTools to authorize access to the socket.
         DEFAULT,
 
         // In addition to default authorization allows access to an app with android permission
         // named chromeAppPackageName + DEBUG_PERMISSION_SIFFIX.
         ALLOW_DEBUG_PERMISSION,
     }
@@ skipping 26 matching lines @@
     private native void nativeSetRemoteDebuggingEnabled(
             long devToolsServer, boolean enabled, boolean allowDebugPermission);
 
     @CalledByNative
     private static boolean checkDebugPermission(Context context, int pid, int uid) {
         String debugPermissionName = context.getPackageName() + DEBUG_PERMISSION_SIFFIX;
         return ApiCompatibilityUtils.checkPermission(context, debugPermissionName, pid, uid)
                 == PackageManager.PERMISSION_GRANTED;
     }
 }