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

third_party/protobuf/csharp/src/Google.Protobuf/Reflection/ServiceDescriptor.cs

-#region Copyright notice and license
-// 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.
-//     * 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.
-#endregion
-
-using System;
-using System.Collections.Generic;
-
-namespace Google.Protobuf.Reflection
-{
-    /// <summary>
-    /// Describes a service type.
-    /// </summary>
-    public sealed class ServiceDescriptor : DescriptorBase
-    {
-        private readonly ServiceDescriptorProto proto;
-        private readonly IList<MethodDescriptor> methods;
-
-        internal ServiceDescriptor(ServiceDescriptorProto proto, FileDescriptor file, int index)
-            : base(file, file.ComputeFullName(null, proto.Name), index)
-        {
-            this.proto = proto;
-            methods = DescriptorUtil.ConvertAndMakeReadOnly(proto.Method,
-                                                            (method, i) => new MethodDescriptor(method, file, this, i));
-
-            file.DescriptorPool.AddSymbol(this);
-        }
-
-        /// <summary>
-        /// The brief name of the descriptor's target.
-        /// </summary>
-        public override string Name { get { return proto.Name; } }
-
-        internal ServiceDescriptorProto Proto { get { return proto; } }
-
-        /// <value>
-        /// An unmodifiable list of methods in this service.
-        /// </value>
-        public IList<MethodDescriptor> Methods
-        {
-            get { return methods; }
-        }
-
-        /// <summary>
-        /// Finds a method by name.
-        /// </summary>
-        /// <param name="name">The unqualified name of the method (e.g. "Foo").</param>
-        /// <returns>The method's decsriptor, or null if not found.</returns>
-        public MethodDescriptor FindMethodByName(String name)
-        {
-            return File.DescriptorPool.FindSymbol<MethodDescriptor>(FullName + "." + name);
-        }
-
-        internal void CrossLink()
-        {
-            foreach (MethodDescriptor method in methods)
-            {
-                method.CrossLink();
-            }
-        }
-    }
-}