Reverts third_party/protobuf: Update to HEAD (f52e188fe4)

third_party/protobuf/java/core/src/test/java/com/google/protobuf/UnknownFieldSetLiteTest.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 17 matching lines @@
 // (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.UnittestLite.TestAllExtensionsLite;
 import com.google.protobuf.UnittestLite.TestAllTypesLite;
 import protobuf_unittest.lite_equals_and_hash.LiteEqualsAndHash;
 import protobuf_unittest.lite_equals_and_hash.LiteEqualsAndHash.Bar;
 import protobuf_unittest.lite_equals_and_hash.LiteEqualsAndHash.Foo;
+
+import junit.framework.TestCase;
+
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
-import junit.framework.TestCase;
 
 /**
  * Tests for {@link UnknownFieldSetLite}.
  *
  * @author dweis@google.com (Daniel Weis)
  */
 public class UnknownFieldSetLiteTest extends TestCase {
   
   public void testDefaultInstance() {
     UnknownFieldSetLite unknownFields = UnknownFieldSetLite.getDefaultInstance();
@@ skipping 266 matching lines @@
     CodedOutputStream output = CodedOutputStream.newInstance(byteArrayOutputStream);
     try {
       unknownFields.writeTo(output);
       output.flush();
     } catch (IOException e) {
       throw new RuntimeException(e);
     }
     return ByteString.copyFrom(byteArrayOutputStream.toByteArray());
   }
 }