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

third_party/protobuf/csharp/src/Google.Protobuf.Test/IssuesTest.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 Google.Protobuf.Reflection;
-using UnitTest.Issues.TestProtos;
-using NUnit.Framework;
-
-
-namespace Google.Protobuf
-{
-    /// <summary>
-    /// Tests for issues which aren't easily compartmentalized into other unit tests.
-    /// </summary>
-    public class IssuesTest
-    {
-        // Issue 45
-        [Test]
-        public void FieldCalledItem()
-        {
-            ItemField message = new ItemField { Item = 3 };
-            FieldDescriptor field = ItemField.Descriptor.FindFieldByName("item");
-            Assert.NotNull(field);
-            Assert.AreEqual(3, (int)field.Accessor.GetValue(message));
-        }
-
-        [Test]
-        public void ReservedNames()
-        {
-            var message = new ReservedNames { Types_ = 10, Descriptor_ = 20 };
-            // Underscores aren't reflected in the JSON.
-            Assert.AreEqual("{ \"types\": 10, \"descriptor\": 20 }", message.ToString());
-        }
-    }
-}