[Cronet] Fix SdchTest.DictionaryAddedObserver

components/cronet/android/test/javatests/src/org/chromium/net/SdchTest.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.net;
 
 import android.os.ConditionVariable;
 import android.test.suitebuilder.annotation.SmallTest;
 
 import org.json.JSONException;
@@ skipping 129 matching lines @@
                 callback1.mResponseInfo.getAllHeaders().get("Get-Dictionary"));
 
         // Make a request to fetch /sdch/test, and make sure Sdch encoding is not used.
         TestUrlRequestCallback callback2 = startAndWaitForComplete(
                 mTestFramework.mCronetEngine, NativeTestServer.getSdchURL() + "/sdch/test");
         assertEquals(200, callback2.mResponseInfo.getHttpStatusCode());
         assertEquals("Sdch is not used.\n", callback2.mResponseAsString);
     }
 
     private static class DictionaryAddedObserver extends SdchObserver {
-        ConditionVariable mBlock = new ConditionVariable();
+        private final ConditionVariable mBlock;
 
         public DictionaryAddedObserver(String targetUrl, long contextAdapter) {
             super(targetUrl, contextAdapter);
+            mBlock = new ConditionVariable();
         }
 
         @Override
         public void onDictionaryAdded() {
             mBlock.open();
         }
 
         public void waitForDictionaryAdded() {
             if (!mDictionaryAlreadyPresent) {
                 mBlock.block();
@@ skipping 24 matching lines @@
         while ((line = reader.readLine()) != null) {
             if (line.contains(content)) {
                 reader.close();
                 return true;
             }
         }
         reader.close();
         return false;
     }
 }