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

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

Index: third_party/protobuf/csharp/src/Google.Protobuf/Reflection/MessageDescriptor.cs
diff --git a/third_party/protobuf/csharp/src/Google.Protobuf/Reflection/MessageDescriptor.cs b/third_party/protobuf/csharp/src/Google.Protobuf/Reflection/MessageDescriptor.cs
deleted file mode 100644
index 82901f1b2b1b452b761e6b6e678d0c7db374d1b9..0000000000000000000000000000000000000000
--- a/third_party/protobuf/csharp/src/Google.Protobuf/Reflection/MessageDescriptor.cs
+++ /dev/null
@@ -1,299 +0,0 @@
-#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;
-using System.Collections.ObjectModel;
-using System.Linq;
-
-namespace Google.Protobuf.Reflection
-{
-    /// <summary>
-    /// Describes a message type.
-    /// </summary>
-    public sealed class MessageDescriptor : DescriptorBase
-    {
-        private static readonly HashSet<string> WellKnownTypeNames = new HashSet<string>
-        {
-            "google/protobuf/any.proto",
-            "google/protobuf/api.proto",
-            "google/protobuf/duration.proto",
-            "google/protobuf/empty.proto",
-            "google/protobuf/wrappers.proto",
-            "google/protobuf/timestamp.proto",
-            "google/protobuf/field_mask.proto",
-            "google/protobuf/source_context.proto",
-            "google/protobuf/struct.proto",
-            "google/protobuf/type.proto",
-        };
-
-        private readonly DescriptorProto proto;
-        private readonly MessageDescriptor containingType;
-        private readonly IList<MessageDescriptor> nestedTypes;
-        private readonly IList<EnumDescriptor> enumTypes;
-        private readonly IList<FieldDescriptor> fieldsInDeclarationOrder;
-        private readonly IList<FieldDescriptor> fieldsInNumberOrder;
-        private readonly FieldCollection fields;
-        private readonly IList<OneofDescriptor> oneofs;
-        // CLR representation of the type described by this descriptor, if any.
-        private readonly Type generatedType;
-        
-        internal MessageDescriptor(DescriptorProto proto, FileDescriptor file, MessageDescriptor parent, int typeIndex, GeneratedCodeInfo generatedCodeInfo)
-            : base(file, file.ComputeFullName(parent, proto.Name), typeIndex)
-        {
-            this.proto = proto;
-            generatedType = generatedCodeInfo == null ? null : generatedCodeInfo.ClrType;
-
-            containingType = parent;
-
-            oneofs = DescriptorUtil.ConvertAndMakeReadOnly(
-                proto.OneofDecl,
-                (oneof, index) =>
-                new OneofDescriptor(oneof, file, this, index, generatedCodeInfo == null ? null : generatedCodeInfo.OneofNames[index]));
-
-            nestedTypes = DescriptorUtil.ConvertAndMakeReadOnly(
-                proto.NestedType,
-                (type, index) =>
-                new MessageDescriptor(type, file, this, index, generatedCodeInfo == null ? null : generatedCodeInfo.NestedTypes[index]));
-
-            enumTypes = DescriptorUtil.ConvertAndMakeReadOnly(
-                proto.EnumType,
-                (type, index) =>
-                new EnumDescriptor(type, file, this, index, generatedCodeInfo == null ? null : generatedCodeInfo.NestedEnums[index]));
-
-            fieldsInDeclarationOrder = DescriptorUtil.ConvertAndMakeReadOnly(
-                proto.Field,
-                (field, index) =>
-                new FieldDescriptor(field, file, this, index, generatedCodeInfo == null ? null : generatedCodeInfo.PropertyNames[index]));
-            fieldsInNumberOrder = new ReadOnlyCollection<FieldDescriptor>(fieldsInDeclarationOrder.OrderBy(field => field.FieldNumber).ToArray());
-            file.DescriptorPool.AddSymbol(this);
-            fields = new FieldCollection(this);
-        }
-                
-        /// <summary>
-        /// Returns the total number of nested types and enums, recursively.
-        /// </summary>
-        private int CountTotalGeneratedTypes()
-        {
-            return nestedTypes.Sum(nested => nested.CountTotalGeneratedTypes()) + enumTypes.Count;
-        }
-
-        /// <summary>
-        /// The brief name of the descriptor's target.
-        /// </summary>
-        public override string Name { get { return proto.Name; } }
-
-        internal DescriptorProto Proto { get { return proto; } }
-
-        /// <summary>
-        /// The generated type for this message, or <c>null</c> if the descriptor does not represent a generated type.
-        /// </summary>
-        public Type GeneratedType { get { return generatedType; } }
-
-        /// <summary>
-        /// Returns whether this message is one of the "well known types" which may have runtime/protoc support.
-        /// </summary>
-        internal bool IsWellKnownType
-        {
-            get
-            {
-                return File.Package == "google.protobuf" && WellKnownTypeNames.Contains(File.Name);
-            }
-        }
-
-        /// <value>
-        /// If this is a nested type, get the outer descriptor, otherwise null.
-        /// </value>
-        public MessageDescriptor ContainingType
-        {
-            get { return containingType; }
-        }
-
-        /// <value>
-        /// A collection of fields, which can be retrieved by name or field number.
-        /// </value>
-        public FieldCollection Fields
-        {
-            get { return fields; }
-        }
-
-        /// <value>
-        /// An unmodifiable list of this message type's nested types.
-        /// </value>
-        public IList<MessageDescriptor> NestedTypes
-        {
-            get { return nestedTypes; }
-        }
-
-        /// <value>
-        /// An unmodifiable list of this message type's enum types.
-        /// </value>
-        public IList<EnumDescriptor> EnumTypes
-        {
-            get { return enumTypes; }
-        }
-
-        /// <value>
-        /// An unmodifiable list of the "oneof" field collections in this message type.
-        /// </value>
-        public IList<OneofDescriptor> Oneofs
-        {
-            get { return oneofs; }
-        }
-
-        /// <summary>
-        /// Finds a field by field name.
-        /// </summary>
-        /// <param name="name">The unqualified name of the field (e.g. "foo").</param>
-        /// <returns>The field's descriptor, or null if not found.</returns>
-        public FieldDescriptor FindFieldByName(String name)
-        {
-            return File.DescriptorPool.FindSymbol<FieldDescriptor>(FullName + "." + name);
-        }
-
-        /// <summary>
-        /// Finds a field by field number.
-        /// </summary>
-        /// <param name="number">The field number within this message type.</param>
-        /// <returns>The field's descriptor, or null if not found.</returns>
-        public FieldDescriptor FindFieldByNumber(int number)
-        {
-            return File.DescriptorPool.FindFieldByNumber(this, number);
-        }
-
-        /// <summary>
-        /// Finds a nested descriptor by name. The is valid for fields, nested
-        /// message types, oneofs and enums.
-        /// </summary>
-        /// <param name="name">The unqualified name of the descriptor, e.g. "Foo"</param>
-        /// <returns>The descriptor, or null if not found.</returns>
-        public T FindDescriptor<T>(string name)
-            where T : class, IDescriptor
-        {
-            return File.DescriptorPool.FindSymbol<T>(FullName + "." + name);
-        }
-
-        /// <summary>
-        /// Looks up and cross-links all fields and nested types.
-        /// </summary>
-        internal void CrossLink()
-        {
-            foreach (MessageDescriptor message in nestedTypes)
-            {
-                message.CrossLink();
-            }
-
-            foreach (FieldDescriptor field in fieldsInDeclarationOrder)
-            {
-                field.CrossLink();
-            }
-
-            foreach (OneofDescriptor oneof in oneofs)
-            {
-                oneof.CrossLink();
-            }
-        }
-
-        /// <summary>
-        /// A collection to simplify retrieving the field accessor for a particular field.
-        /// </summary>
-        public sealed class FieldCollection
-        {
-            private readonly MessageDescriptor messageDescriptor;
-
-            internal FieldCollection(MessageDescriptor messageDescriptor)
-            {
-                this.messageDescriptor = messageDescriptor;
-            }
-
-            /// <value>
-            /// Returns the fields in the message as an immutable list, in the order in which they
-            /// are declared in the source .proto file.
-            /// </value>
-            public IList<FieldDescriptor> InDeclarationOrder()
-            {
-                return messageDescriptor.fieldsInDeclarationOrder;
-            }
-
-            /// <value>
-            /// Returns the fields in the message as an immutable list, in ascending field number
-            /// order. Field numbers need not be contiguous, so there is no direct mapping from the
-            /// index in the list to the field number; to retrieve a field by field number, it is better
-            /// to use the <see cref="FieldCollection"/> indexer.
-            /// </value>
-            public IList<FieldDescriptor> InFieldNumberOrder()
-            {
-                return messageDescriptor.fieldsInNumberOrder;
-            }
-
-            /// <summary>
-            /// Retrieves the descriptor for the field with the given number.
-            /// </summary>
-            /// <param name="number">Number of the field to retrieve the descriptor for</param>
-            /// <returns>The accessor for the given field</returns>
-            /// <exception cref="KeyNotFoundException">The message descriptor does not contain a field
-            /// with the given number</exception>
-            public FieldDescriptor this[int number]
-            {
-                get
-                {
-                    var fieldDescriptor = messageDescriptor.FindFieldByNumber(number);
-                    if (fieldDescriptor == null)
-                    {
-                        throw new KeyNotFoundException("No such field number");
-                    }
-                    return fieldDescriptor;
-                }
-            }
-
-            /// <summary>
-            /// Retrieves the descriptor for the field with the given name.
-            /// </summary>
-            /// <param name="name">Name of the field to retrieve the descriptor for</param>
-            /// <returns>The descriptor for the given field</returns>
-            /// <exception cref="KeyNotFoundException">The message descriptor does not contain a field
-            /// with the given name</exception>
-            public FieldDescriptor this[string name]
-            {
-                get
-                {
-                    var fieldDescriptor = messageDescriptor.FindFieldByName(name);
-                    if (fieldDescriptor == null)
-                    {
-                        throw new KeyNotFoundException("No such field name");
-                    }
-                    return fieldDescriptor;
-                }
-            }
-        }
-    }
-}