[Sync] Fixing easy lint violations.

components/sync/base/immutable.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Immutable<T> provides an easy, cheap, and thread-safe way to pass
 // large immutable data around.
 //
 // For example, consider the following code:
 //
 //  typedef std::vector<LargeObject> LargeObjectList;
@@ skipping 46 matching lines @@
 // used by providing your own traits class or using one of the
 // pre-defined ones below.  See comments on traits below for details.
 //
 // NOTE: Some complexity is necessary in order to use Immutable<T>
 // with forward-declared types.  See comments on traits below for
 // details.
 
 #ifndef COMPONENTS_SYNC_BASE_IMMUTABLE_H_
 #define COMPONENTS_SYNC_BASE_IMMUTABLE_H_
 
-// For std::swap().
-#include <algorithm>
+#include <utility>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 
 namespace syncer {
 
 namespace internal {
 // This class is part of the Immutable implementation.  DO NOT USE
 // THIS CLASS DIRECTLY YOURSELF.
 
@@ skipping 160 matching lines @@
 
 // Helper function to avoid having to write out template arguments.
 template <typename T>
 Immutable<T> MakeImmutable(T* t) {
   return Immutable<T>(t);
 }
 
 }  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_BASE_IMMUTABLE_H_