Allow direct executors in cronet.

components/cronet/android/test/javatests/src/org/chromium/net/TestUploadDataProvider.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 java.io.IOException;
 import java.nio.ByteBuffer;
@@ skipping 261 matching lines @@
 
     @Override
     public void close() throws IOException {
         if (!mClosed.compareAndSet(false, true)) {
             throw new AssertionError("Closed twice");
         }
         mAwaitingClose.open();
     }
 
     public void assertClosed() {
-        mAwaitingClose.block();
+        mAwaitingClose.block(5000);
         if (!mClosed.get()) {
             throw new AssertionError("Was not closed");
         }
     }
 }