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

third_party/protobuf/csharp/src/Google.Protobuf/WellKnownTypes/DurationPartial.cs

Index: third_party/protobuf/csharp/src/Google.Protobuf/WellKnownTypes/DurationPartial.cs
diff --git a/third_party/protobuf/csharp/src/Google.Protobuf/WellKnownTypes/DurationPartial.cs b/third_party/protobuf/csharp/src/Google.Protobuf/WellKnownTypes/DurationPartial.cs
deleted file mode 100644
index 18ebefd263e63fb47d77de2b6d7be8252bf553ab..0000000000000000000000000000000000000000
--- a/third_party/protobuf/csharp/src/Google.Protobuf/WellKnownTypes/DurationPartial.cs
+++ /dev/null
@@ -1,151 +0,0 @@
-#region Copyright notice and license
-// Protocol Buffers - Google's data interchange format
-// Copyright 2015 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;
-
-namespace Google.Protobuf.WellKnownTypes
-{
-    // Manually-written partial class for the Duration well-known type,
-    // providing a conversion to TimeSpan and convenience operators.
-    public partial class Duration
-    {
-        /// <summary>
-        /// The number of nanoseconds in a second.
-        /// </summary>
-        public const int NanosecondsPerSecond = 1000000000;
-        /// <summary>
-        /// The number of nanoseconds in a BCL tick (as used by <see cref="TimeSpan"/> and <see cref="DateTime"/>).
-        /// </summary>
-        public const int NanosecondsPerTick = 100;
-
-        /// <summary>
-        /// Converts this <see cref="Duration"/> to a <see cref="TimeSpan"/>.
-        /// </summary>
-        /// <remarks>If the duration is not a precise number of ticks, it is truncated towards 0.</remarks>
-        /// <returns>The value of this duration, as a <c>TimeSpan</c>.</returns>
-        public TimeSpan ToTimeSpan()
-        {
-            checked
-            {
-                long ticks = Seconds * TimeSpan.TicksPerSecond + Nanos / NanosecondsPerTick;
-                return TimeSpan.FromTicks(ticks);
-            }
-        }
-
-        /// <summary>
-        /// Converts the given <see cref="TimeSpan"/> to a <see cref="Duration"/>.
-        /// </summary>
-        /// <param name="timeSpan">The <c>TimeSpan</c> to convert.</param>
-        /// <returns>The value of the given <c>TimeSpan</c>, as a <c>Duration</c>.</returns>
-        public static Duration FromTimeSpan(TimeSpan timeSpan)
-        {
-            checked
-            {
-                long ticks = timeSpan.Ticks;
-                long seconds = ticks / TimeSpan.TicksPerSecond;
-                int nanos = (int) (ticks % TimeSpan.TicksPerSecond) * NanosecondsPerTick;
-                return new Duration { Seconds = seconds, Nanos = nanos };
-            }
-        }
-
-        /// <summary>
-        /// Returns the result of negating the duration. For example, the negation of 5 minutes is -5 minutes.
-        /// </summary>
-        /// <param name="value">The duration to negate. Must not be null.</param>
-        /// <returns>The negated value of this duration.</returns>
-        public static Duration operator -(Duration value)
-        {
-            Preconditions.CheckNotNull(value, "value");
-            checked
-            {
-                return Normalize(-value.Seconds, -value.Nanos);
-            }
-        }
-
-        /// <summary>
-        /// Adds the two specified <see cref="Duration"/> values together.
-        /// </summary>
-        /// <param name="lhs">The first value to add. Must not be null.</param>
-        /// <param name="rhs">The second value to add. Must not be null.</param>
-        /// <returns></returns>
-        public static Duration operator +(Duration lhs, Duration rhs)
-        {
-            Preconditions.CheckNotNull(lhs, "lhs");
-            Preconditions.CheckNotNull(rhs, "rhs");
-            checked
-            {
-                return Normalize(lhs.Seconds + rhs.Seconds, lhs.Nanos + rhs.Nanos);
-            }
-        }
-
-        /// <summary>
-        /// Subtracts one <see cref="Duration"/> from another.
-        /// </summary>
-        /// <param name="lhs">The duration to subtract from. Must not be null.</param>
-        /// <param name="rhs">The duration to subtract. Must not be null.</param>
-        /// <returns>The difference between the two specified durations.</returns>
-        public static Duration operator -(Duration lhs, Duration rhs)
-        {
-            Preconditions.CheckNotNull(lhs, "lhs");
-            Preconditions.CheckNotNull(rhs, "rhs");
-            checked
-            {
-                return Normalize(lhs.Seconds - rhs.Seconds, lhs.Nanos - rhs.Nanos);
-            }
-        }
-        
-        /// <summary>
-        /// Creates a duration with the normalized values from the given number of seconds and
-        /// nanoseconds, conforming with the description in the proto file.
-        /// </summary>
-        internal static Duration Normalize(long seconds, int nanoseconds)
-        {
-            // Ensure that nanoseconds is in the range (-1,000,000,000, +1,000,000,000)
-            int extraSeconds = nanoseconds / NanosecondsPerSecond;
-            seconds += extraSeconds;
-            nanoseconds -= extraSeconds * NanosecondsPerSecond;
-
-            // Now make sure that Sign(seconds) == Sign(nanoseconds) if Sign(seconds) != 0.
-            if (seconds < 0 && nanoseconds > 0)
-            {
-                seconds += 1;
-                nanoseconds -= NanosecondsPerSecond;
-            }
-            else if (seconds > 0 && nanoseconds < 0)
-            {
-                seconds -= 1;
-                nanoseconds += NanosecondsPerSecond;
-            }
-            return new Duration { Seconds = seconds, Nanos = nanoseconds };
-        }
-    }
-}