Move base::FreeDeleter into its own header.

media/base/bind_to_current_loop_unittest.cc

 // 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.
 
 #include "media/base/bind_to_current_loop.h"
 
 #include <utility>
 
+#include "base/memory/free_deleter.h"
 #include "base/message_loop/message_loop.h"
 #include "base/synchronization/waitable_event.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace media {
 
 void BoundBoolSet(bool* var, bool val) {
   *var = val;
 }
 
@@ skipping 142 matching lines @@
       &BoundIntegersSet, &a, &b));
   cb.Run(1, -1);
   EXPECT_EQ(a, 0);
   EXPECT_EQ(b, 0);
   loop_.RunUntilIdle();
   EXPECT_EQ(a, 1);
   EXPECT_EQ(b, -1);
 }
 
 }  // namespace media