Switch to standard integer types in content/.

BUG=138542
[email protected]

Review URL: https://codereview.chromium.org/1544273002

Cr-Commit-Position: refs/heads/master@{#366875}
diff --git a/content/test/mock_keyboard_driver_win.cc b/content/test/mock_keyboard_driver_win.cc
index 3bac800..363a3d1 100644
--- a/content/test/mock_keyboard_driver_win.cc
+++ b/content/test/mock_keyboard_driver_win.cc
@@ -4,8 +4,11 @@
 
 #include "content/test/mock_keyboard_driver_win.h"
 
-#include "base/basictypes.h"
+#include <stddef.h>
+#include <string.h>
+
 #include "base/logging.h"
+#include "base/macros.h"
 #include "content/test/mock_keyboard.h"
 
 namespace content {