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

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

Index: third_party/protobuf/csharp/src/Google.Protobuf/Reflection/ReflectionUtil.cs
diff --git a/third_party/protobuf/csharp/src/Google.Protobuf/Reflection/ReflectionUtil.cs b/third_party/protobuf/csharp/src/Google.Protobuf/Reflection/ReflectionUtil.cs
deleted file mode 100644
index df820ca36bd8eb41d0f577c5508d09db7bf80b0b..0000000000000000000000000000000000000000
--- a/third_party/protobuf/csharp/src/Google.Protobuf/Reflection/ReflectionUtil.cs
+++ /dev/null
@@ -1,107 +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.Linq.Expressions;
-using System.Reflection;
-
-namespace Google.Protobuf.Reflection
-{
-    /// <summary>
-    /// The methods in this class are somewhat evil, and should not be tampered with lightly.
-    /// Basically they allow the creation of relatively weakly typed delegates from MethodInfos
-    /// which are more strongly typed. They do this by creating an appropriate strongly typed
-    /// delegate from the MethodInfo, and then calling that within an anonymous method.
-    /// Mind-bending stuff (at least to your humble narrator) but the resulting delegates are
-    /// very fast compared with calling Invoke later on.
-    /// </summary>
-    internal static class ReflectionUtil
-    {
-        /// <summary>
-        /// Empty Type[] used when calling GetProperty to force property instead of indexer fetching.
-        /// </summary>
-        internal static readonly Type[] EmptyTypes = new Type[0];
-
-        /// <summary>
-        /// Creates a delegate which will cast the argument to the appropriate method target type,
-        /// call the method on it, then convert the result to object.
-        /// </summary>
-        internal static Func<IMessage, object> CreateFuncIMessageObject(MethodInfo method)
-        {
-            ParameterExpression parameter = Expression.Parameter(typeof(IMessage), "p");
-            Expression downcast = Expression.Convert(parameter, method.DeclaringType);
-            Expression call = Expression.Call(downcast, method);
-            Expression upcast = Expression.Convert(call, typeof(object));
-            return Expression.Lambda<Func<IMessage, object>>(upcast, parameter).Compile();
-        }
-
-        /// <summary>
-        /// Creates a delegate which will cast the argument to the appropriate method target type,
-        /// call the method on it, then convert the result to the specified type.
-        /// </summary>
-        internal static Func<IMessage, T> CreateFuncIMessageT<T>(MethodInfo method)
-        {
-            ParameterExpression parameter = Expression.Parameter(typeof(IMessage), "p");
-            Expression downcast = Expression.Convert(parameter, method.DeclaringType);
-            Expression call = Expression.Call(downcast, method);
-            Expression upcast = Expression.Convert(call, typeof(T));
-            return Expression.Lambda<Func<IMessage, T>>(upcast, parameter).Compile();
-        }
-
-        /// <summary>
-        /// Creates a delegate which will execute the given method after casting the first argument to
-        /// the target type of the method, and the second argument to the first parameter type of the method.
-        /// </summary>
-        internal static Action<IMessage, object> CreateActionIMessageObject(MethodInfo method)
-        {
-            ParameterExpression targetParameter = Expression.Parameter(typeof(IMessage), "target");
-            ParameterExpression argParameter = Expression.Parameter(typeof(object), "arg");
-            Expression castTarget = Expression.Convert(targetParameter, method.DeclaringType);
-            Expression castArgument = Expression.Convert(argParameter, method.GetParameters()[0].ParameterType);
-            Expression call = Expression.Call(castTarget, method, castArgument);
-            return Expression.Lambda<Action<IMessage, object>>(call, targetParameter, argParameter).Compile();
-        }
-
-        /// <summary>
-        /// Creates a delegate which will execute the given method after casting the first argument to
-        /// the target type of the method.
-        /// </summary>
-        internal static Action<IMessage> CreateActionIMessage(MethodInfo method)
-        {
-            ParameterExpression targetParameter = Expression.Parameter(typeof(IMessage), "target");
-            Expression castTarget = Expression.Convert(targetParameter, method.DeclaringType);
-            Expression call = Expression.Call(castTarget, method);
-            return Expression.Lambda<Action<IMessage>>(call, targetParameter).Compile();
-        }        
-    }
-}