Revert https://codereview.chromium.org/1291903002 (protobuf roll).

third_party/protobuf/ruby/src/main/java/com/google/protobuf/jruby/RubyEnum.java

Index: third_party/protobuf/ruby/src/main/java/com/google/protobuf/jruby/RubyEnum.java
diff --git a/third_party/protobuf/ruby/src/main/java/com/google/protobuf/jruby/RubyEnum.java b/third_party/protobuf/ruby/src/main/java/com/google/protobuf/jruby/RubyEnum.java
deleted file mode 100644
index 929d8699901531917c0625c7239b41764c43d2dd..0000000000000000000000000000000000000000
--- a/third_party/protobuf/ruby/src/main/java/com/google/protobuf/jruby/RubyEnum.java
+++ /dev/null
@@ -1,86 +0,0 @@
-/*
- * Protocol Buffers - Google's data interchange format
- * Copyright 2014 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.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * 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.jruby;
-
-import com.google.protobuf.Descriptors;
-import org.jruby.RubyModule;
-import org.jruby.RubyNumeric;
-import org.jruby.anno.JRubyMethod;
-import org.jruby.runtime.ThreadContext;
-import org.jruby.runtime.builtin.IRubyObject;
-
-public class RubyEnum {
-    /*
-     * call-seq:
-     *     Enum.lookup(number) => name
-     *
-     * This module method, provided on each generated enum module, looks up an enum
-     * value by number and returns its name as a Ruby symbol, or nil if not found.
-     */
-    @JRubyMethod(meta = true)
-    public static IRubyObject lookup(ThreadContext context, IRubyObject recv, IRubyObject number) {
-        RubyEnumDescriptor rubyEnumDescriptorescriptor = (RubyEnumDescriptor) getDescriptor(context, recv);
-        Descriptors.EnumDescriptor descriptor = rubyEnumDescriptorescriptor.getDescriptor();
-        Descriptors.EnumValueDescriptor value = descriptor.findValueByNumber(RubyNumeric.num2int(number));
-        if (value == null) return context.runtime.getNil();
-        return context.runtime.newSymbol(value.getName());
-    }
-
-    /*
-     * call-seq:
-     *     Enum.resolve(name) => number
-     *
-     * This module method, provided on each generated enum module, looks up an enum
-     * value by name (as a Ruby symbol) and returns its name, or nil if not found.
-     */
-    @JRubyMethod(meta = true)
-    public static IRubyObject resolve(ThreadContext context, IRubyObject recv, IRubyObject name) {
-        RubyEnumDescriptor rubyEnumDescriptorescriptor = (RubyEnumDescriptor) getDescriptor(context, recv);
-        Descriptors.EnumDescriptor descriptor = rubyEnumDescriptorescriptor.getDescriptor();
-        Descriptors.EnumValueDescriptor value = descriptor.findValueByName(name.asJavaString());
-        if (value == null) return context.runtime.getNil();
-        return context.runtime.newFixnum(value.getNumber());
-    }
-
-    /*
-     * call-seq:
-     *     Enum.descriptor
-     *
-     * This module method, provided on each generated enum module, returns the
-     * EnumDescriptor corresponding to this enum type.
-     */
-    @JRubyMethod(meta = true, name = "descriptor")
-    public static IRubyObject getDescriptor(ThreadContext context, IRubyObject recv) {
-        return ((RubyModule) recv).getInstanceVariable(Utils.DESCRIPTOR_INSTANCE_VAR);
-    }
-}