Switch to standard integer types in chrome/browser/extensions/.

BUG=138542
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Review URL: https://codereview.chromium.org/1549933002

Cr-Commit-Position: refs/heads/master@{#366840}
diff --git a/chrome/browser/extensions/api/mdns/mdns_api.h b/chrome/browser/extensions/api/mdns/mdns_api.h
index edcef4d..13d847a 100644
--- a/chrome/browser/extensions/api/mdns/mdns_api.h
+++ b/chrome/browser/extensions/api/mdns/mdns_api.h
@@ -10,6 +10,7 @@
 #include <string>
 
 #include "base/gtest_prod_util.h"
+#include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/threading/thread_checker.h"
 #include "chrome/browser/extensions/api/mdns/dns_sd_registry.h"