Switch to standard integer types in ui/gl/.

BUG=138542
[email protected]

Review URL: https://codereview.chromium.org/1545113002

Cr-Commit-Position: refs/heads/master@{#366830}
diff --git a/ui/gl/gl_context_wgl.h b/ui/gl/gl_context_wgl.h
index 21b3840..69c7e5c0 100644
--- a/ui/gl/gl_context_wgl.h
+++ b/ui/gl/gl_context_wgl.h
@@ -7,6 +7,7 @@
 
 #include <string>
 
+#include "base/macros.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gl/gl_context.h"