Make the fuchsia mojo/public repo the source of truth.

mojo/public/java/bindings/src/org/chromium/mojo/bindings/DataHeader.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.mojo.bindings;
-
-/**
- * The header for a mojo complex element.
- */
-public final class DataHeader {
-    /**
-     * The size of a serialized header, in bytes.
-     */
-    public static final int HEADER_SIZE = 8;
-
-    /**
-     * The offset of the size field.
-     */
-    public static final int SIZE_OFFSET = 0;
-
-    /**
-     * The offset of the number of fields field.
-     */
-    public static final int ELEMENTS_OR_VERSION_OFFSET = 4;
-
-    /**
-     * The size of the object owning this header.
-     */
-    public final int size;
-
-    /**
-     * Number of element (for an array) or version (for a struct) of the object owning this
-     * header.
-     */
-    public final int elementsOrVersion;
-
-    /**
-     * Constructor.
-     */
-    public DataHeader(int size, int elementsOrVersion) {
-        super();
-        this.size = size;
-        this.elementsOrVersion = elementsOrVersion;
-    }
-
-    /**
-     * @see Object#hashCode()
-     */
-    @Override
-    public int hashCode() {
-        final int prime = 31;
-        int result = 1;
-        result = prime * result + elementsOrVersion;
-        result = prime * result + size;
-        return result;
-    }
-
-    /**
-     * @see Object#equals(Object)
-     */
-    @Override
-    public boolean equals(Object object) {
-        if (object == this) return true;
-        if (object == null) return false;
-        if (getClass() != object.getClass()) return false;
-
-        DataHeader other = (DataHeader) object;
-        return (elementsOrVersion == other.elementsOrVersion && size == other.size);
-    }
-}