Merge to XFA: Fix (nearly all) IWYU in fpdfskd/include/javascript/ headers.

Original Review URL: https://codereview.chromium.org/1060133002
TBR=thestig@chromium.org

Review URL: https://codereview.chromium.org/1065103002
diff --git a/fpdfsdk/include/javascript/PublicMethods.h b/fpdfsdk/include/javascript/PublicMethods.h
index 1decb6f..e7a4010 100644
--- a/fpdfsdk/include/javascript/PublicMethods.h
+++ b/fpdfsdk/include/javascript/PublicMethods.h
@@ -7,6 +7,8 @@
 #ifndef _PUBLICMETHODS_H_
 #define _PUBLICMETHODS_H_
 
+#include "JS_Define.h"
+
 class CJS_PublicMethods : public CJS_Object
 {
 public: