run iwyu on base!

base/debug/stack_trace_posix.cc

Index: base/debug/stack_trace_posix.cc
diff --git a/base/debug/stack_trace_posix.cc b/base/debug/stack_trace_posix.cc
index abbd64213886bfe48331ed66416899acedc5f890..cabce2cd00d72d07a3764b015a76acb9174e53ec 100644
--- a/base/debug/stack_trace_posix.cc
+++ b/base/debug/stack_trace_posix.cc
@@ -2,21 +2,20 @@
 // 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 <execinfo.h>
-#include <fcntl.h>
+#include <i686-apple-darwin10/bits/c++config.h>
+#include <stddef.h>
 #include <stdio.h>
-#include <stdlib.h>
-#include <sys/stat.h>
-#include <sys/sysctl.h>
-#include <sys/types.h>
-#include <unistd.h>
-
+#include <string.h>
+#include <sys/errno.h>
+#include <algorithm>
+#include <ostream>
 #include <string>
 #include <vector>
 
+#include "base/debug/stack_trace.h"
+#include "build/build_config.h"
+
 #if defined(__GLIBCXX__)
 #include <cxxabi.h>
 #endif
@@ -28,11 +27,8 @@
 #include <iostream>
 
 #include "base/basictypes.h"
-#include "base/eintr_wrapper.h"
-#include "base/logging.h"
 #include "base/safe_strerror_posix.h"
 #include "base/scoped_ptr.h"
-#include "base/string_piece.h"
 #include "base/stringprintf.h"
 
 #if defined(USE_SYMBOLIZE)