Merge to XFA: Make the vast majority of JS headers private to src/javascript.

(cherry picked from commit 5b3d0208723f21c50b9922bdc500c9d78c359a25)
Original Review URL: https://codereview.chromium.org/1389783002 .

New changes to fix IWYU in:
  fpdfsdk/include/fpdfxfa/fpdfxfa_app.h
  xfa/include/fxfa/fxfa.h
  xfa/include/fxfa/fxfa_objectacc.h

R=thestig@chromium.org

Review URL: https://codereview.chromium.org/1388023003 .
diff --git a/fpdfsdk/src/javascript/JS_GlobalData.cpp b/fpdfsdk/src/javascript/JS_GlobalData.cpp
index e6d21e2..e13b50f 100644
--- a/fpdfsdk/src/javascript/JS_GlobalData.cpp
+++ b/fpdfsdk/src/javascript/JS_GlobalData.cpp
@@ -4,9 +4,10 @@
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
+#include "JS_GlobalData.h"
+
 #include "../../../core/include/fdrm/fx_crypt.h"
 #include "../../include/javascript/IJavaScript.h"
-#include "../../include/javascript/JS_GlobalData.h"
 
 #define JS_MAXGLOBALDATA (1024 * 4 - 8)