Switch to standard integer types in ui/.

BUG=138542
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Review URL: https://codereview.chromium.org/1550483002

Cr-Commit-Position: refs/heads/master@{#366842}
diff --git a/ui/web_dialogs/web_dialog_ui.h b/ui/web_dialogs/web_dialog_ui.h
index e210bf8..f075bee 100644
--- a/ui/web_dialogs/web_dialog_ui.h
+++ b/ui/web_dialogs/web_dialog_ui.h
@@ -9,6 +9,7 @@
 #include <vector>
 
 #include "base/compiler_specific.h"
+#include "base/macros.h"
 #include "base/strings/string16.h"
 #include "content/public/browser/web_contents_delegate.h"
 #include "content/public/browser/web_ui_controller.h"