include what you use: errno.h and string.h in content/

content/gpu/gpu_watchdog_thread.cc

Index: content/gpu/gpu_watchdog_thread.cc
diff --git a/content/gpu/gpu_watchdog_thread.cc b/content/gpu/gpu_watchdog_thread.cc
index 801c2fc9f7a7aa933d5caa1f453e1d7cdc58d006..7f997bfe8da46f390730d2c0bacc9ccd28a261b8 100644
--- a/content/gpu/gpu_watchdog_thread.cc
+++ b/content/gpu/gpu_watchdog_thread.cc
@@ -2,12 +2,14 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include "content/gpu/gpu_watchdog_thread.h"
+
+#include <errno.h>
+
 #if defined(OS_WIN)
 #include <windows.h>
 #endif
 
-#include "content/gpu/gpu_watchdog_thread.h"
-
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"