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/sync_bundle.h b/chrome/browser/extensions/sync_bundle.h
index 944812a..d8229bf 100644
--- a/chrome/browser/extensions/sync_bundle.h
+++ b/chrome/browser/extensions/sync_bundle.h
@@ -8,6 +8,7 @@
 #include <set>
 #include <string>
 
+#include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "sync/api/sync_change.h"
 #include "sync/api/sync_change_processor.h"