Remove redundant field initialization in Java code.

base/test/android/javatests/src/org/chromium/base/test/util/ScalableTimeout.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 org.chromium.base.annotations.SuppressFBWarnings;
 
 /**
  * Utility class for scaling various timeouts by a common factor.
  * For example, to run tests under Valgrind, you might want the following:
  *   adb shell "echo 20.0 > /data/local/tmp/chrome_timeout_scale"
  */
 public class ScalableTimeout {
-    private static Double sTimeoutScale = null;
+    private static Double sTimeoutScale;
     public static final String PROPERTY_FILE = "/data/local/tmp/chrome_timeout_scale";
 
     @SuppressFBWarnings("DMI_HARDCODED_ABSOLUTE_FILENAME")
     public static long scaleTimeout(long timeout) {
         if (sTimeoutScale == null) {
             try {
                 char[] data = TestFileUtil.readUtf8File(PROPERTY_FILE, 32);
                 sTimeoutScale = Double.parseDouble(new String(data));
             } catch (Exception e) {
                 // NumberFormatException, FileNotFoundException, IOException
                 sTimeoutScale = 1.0;
             }
         }
         return (long) (timeout * sTimeoutScale);
     }
 }