Reverts third_party/protobuf: Update to HEAD (f52e188fe4)

third_party/protobuf/java/core/src/main/java/com/google/protobuf/WireFormat.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 29 matching lines @@
  *
  * This class contains constants and helper functions useful for dealing with
  * the Protocol Buffer wire format.
  *
  * @author kenton@google.com Kenton Varda
  */
 public final class WireFormat {
   // Do not allow instantiation.
   private WireFormat() {}
 
-  static final int FIXED_32_SIZE = 4;
-  static final int FIXED_64_SIZE = 8;
-  static final int MAX_VARINT_SIZE = 10;
-
   public static final int WIRETYPE_VARINT           = 0;
   public static final int WIRETYPE_FIXED64          = 1;
   public static final int WIRETYPE_LENGTH_DELIMITED = 2;
   public static final int WIRETYPE_START_GROUP      = 3;
   public static final int WIRETYPE_END_GROUP        = 4;
   public static final int WIRETYPE_FIXED32          = 5;
 
   static final int TAG_TYPE_BITS = 3;
   static final int TAG_TYPE_MASK = (1 << TAG_TYPE_BITS) - 1;
 
@@ skipping 187 matching lines @@
         // We don't handle enums because we don't know what to do if the
         // value is not recognized.
         throw new IllegalArgumentException(
           "readPrimitiveField() cannot handle enums.");
     }
 
     throw new RuntimeException(
       "There is no way to get here, but the compiler thinks otherwise.");
   }
 }