run iwyu on base!

base/path_service.cc

Index: base/path_service.cc
diff --git a/base/path_service.cc b/base/path_service.cc
index 117feb57e89d6d920e6267c51e4a3761bc3e7efb..b9ee7a40d5290961120edff314e556c293fe24b9 100644
--- a/base/path_service.cc
+++ b/base/path_service.cc
@@ -2,17 +2,30 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include <ext/hash_fun.h>
+#include <ext/hashtable.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <algorithm>
+#include <functional>
+#include <hash_map>
+#include <utility>
+#include <vector>
+
+#include "base/base_paths.h"
+#include "base/base_paths_mac.h"
+#include "base/basictypes.h"
 #include "base/path_service.h"
+#include "build/build_config.h"
 
 #ifdef OS_WIN
-#include <windows.h>
 #include <shellapi.h>
 #include <shlobj.h>
+#include <windows.h>
 #endif
 
 #include "base/file_path.h"
 #include "base/file_util.h"
-#include "base/hash_tables.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/synchronization/lock.h"