Reverts third_party/protobuf: Update to HEAD (f52e188fe4)

third_party/protobuf/java/core/src/main/java/com/google/protobuf/UnknownFieldSetLite.java

Index: third_party/protobuf/java/core/src/main/java/com/google/protobuf/UnknownFieldSetLite.java
diff --git a/third_party/protobuf/java/core/src/main/java/com/google/protobuf/UnknownFieldSetLite.java b/third_party/protobuf/java/core/src/main/java/com/google/protobuf/UnknownFieldSetLite.java
index 104f8007b878c7999fc45ea8bec43eac03065f58..9500f905fcaf581d19b24f9e048699486e1af0ca 100644
--- a/third_party/protobuf/java/core/src/main/java/com/google/protobuf/UnknownFieldSetLite.java
+++ b/third_party/protobuf/java/core/src/main/java/com/google/protobuf/UnknownFieldSetLite.java
@@ -176,41 +176,6 @@ public final class UnknownFieldSetLite {
   }
 
   /**
-   * Serializes the set and writes it to {@code output} using {@code MessageSet} wire format.
-   *
-   * <p>For use by generated code only.
-   */
-  public void writeAsMessageSetTo(CodedOutputStream output) throws IOException {
-    for (int i = 0; i < count; i++) {
-      int fieldNumber = WireFormat.getTagFieldNumber(tags[i]);
-      output.writeRawMessageSetExtension(fieldNumber, (ByteString) objects[i]);
-    }
-  }
-  
-  /**
-   * Get the number of bytes required to encode this field, including field
-   * number, using {@code MessageSet} wire format.
-   */
-  public int getSerializedSizeAsMessageSet() {
-    int size = memoizedSerializedSize;
-    if (size != -1) {
-      return size;
-    }
-    
-    size = 0;
-    for (int i = 0; i < count; i++) {
-      int tag = tags[i];
-      int fieldNumber = WireFormat.getTagFieldNumber(tag);
-      size += CodedOutputStream.computeRawMessageSetExtensionSize(
-          fieldNumber, (ByteString) objects[i]);
-    }
-    
-    memoizedSerializedSize = size;
-    
-    return size;
-  }
-
-  /**
    * Get the number of bytes required to encode this set.
    *
    * <p>For use by generated code only.
@@ -303,8 +268,7 @@ public final class UnknownFieldSetLite {
     }
   }
 
-  // Package private for unsafe experimental runtime.
-  void storeField(int tag, Object value) {
+  private void storeField(int tag, Object value) {
     ensureCapacity();
     
     tags[count] = tag;