Reverts third_party/protobuf: Update to HEAD (f52e188fe4)

third_party/protobuf/java/core/src/test/java/com/google/protobuf/ByteStringTest.java

 // Protocol Buffers - Google's data interchange format
 // Copyright 2008 Google Inc.  All rights reserved.
 // https://developers.google.com/protocol-buffers/
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
@@ skipping 13 matching lines @@
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 package com.google.protobuf;
 
 import com.google.protobuf.ByteString.Output;
+
+import junit.framework.TestCase;
+
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
 import java.lang.reflect.Field;
 import java.nio.ByteBuffer;
 import java.nio.charset.Charset;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Iterator;
 import java.util.List;
 import java.util.NoSuchElementException;
 import java.util.Random;
-import junit.framework.TestCase;
 
 /**
  * Test methods with implementations in {@link ByteString}, plus do some top-level "integration"
  * tests.
  *
  * @author carlanton@google.com (Carl Haverl)
  */
 public class ByteStringTest extends TestCase {
 
   private static final Charset UTF_16 = Charset.forName("UTF-16");
@@ skipping 704 matching lines @@
   public void testByteArrayCopier() throws Exception {
     Field field = ByteString.class.getDeclaredField("byteArrayCopier");
     field.setAccessible(true);
     Object byteArrayCopier = field.get(null);
     assertNotNull(byteArrayCopier);
     assertTrue(
         byteArrayCopier.toString(),
         byteArrayCopier.getClass().getSimpleName().endsWith("ArraysByteArrayCopier"));
   }
 }