Move base::FreeDeleter into its own header.

base/debug/stack_trace_posix.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 "base/debug/stack_trace.h"
 
 #include <errno.h>
 #include <fcntl.h>
 #include <signal.h>
 #include <stddef.h>
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <sys/param.h>
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <unistd.h>
 
 #include <map>
 #include <ostream>
 #include <string>
 #include <vector>
 
+#include "base/memory/free_deleter.h"
+
 #if defined(__GLIBCXX__)
 #include <cxxabi.h>
 #endif
 #if !defined(__UCLIBC__)
 #include <execinfo.h>
 #endif
 
 #if defined(OS_MACOSX)
 #include <AvailabilityMacros.h>
 #endif
@@ skipping 769 matching lines @@
     *ptr = *start;
     *start++ = ch;
   }
   return buf;
 }
 
 }  // namespace internal
 
 }  // namespace debug
 }  // namespace base