Switch to standard integer types in content/renderer/.

BUG=138542
[email protected]

Review URL: https://codereview.chromium.org/1547073003

Cr-Commit-Position: refs/heads/master@{#366847}
diff --git a/content/renderer/webpublicsuffixlist_impl.h b/content/renderer/webpublicsuffixlist_impl.h
index 3ab8507..36970473d 100644
--- a/content/renderer/webpublicsuffixlist_impl.h
+++ b/content/renderer/webpublicsuffixlist_impl.h
@@ -5,6 +5,8 @@
 #ifndef CONTENT_RENDERER_WEBPUBLICSUFFIXLIST_IMPL_H_
 #define CONTENT_RENDERER_WEBPUBLICSUFFIXLIST_IMPL_H_
 
+#include <stddef.h>
+
 #include "base/compiler_specific.h"
 #include "third_party/WebKit/public/platform/WebPublicSuffixList.h"