Merge CJS_EventRecorder into CJS_EventContext and remove.

-- fix IWYU encountered along the way.

Change-Id: I6eb1d21ec03aa00ebe0a0828637fd3187374a19a
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/84154
Commit-Queue: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
diff --git a/fxjs/cjs_field.cpp b/fxjs/cjs_field.cpp
index b217d50..9bf542f 100644
--- a/fxjs/cjs_field.cpp
+++ b/fxjs/cjs_field.cpp
@@ -16,6 +16,7 @@
 #include "core/fpdfdoc/cpdf_formcontrol.h"
 #include "core/fpdfdoc/cpdf_formfield.h"
 #include "core/fpdfdoc/cpdf_interactiveform.h"
+#include "fpdfsdk/cpdfsdk_formfillenvironment.h"
 #include "fpdfsdk/cpdfsdk_helpers.h"
 #include "fpdfsdk/cpdfsdk_interactiveform.h"
 #include "fpdfsdk/cpdfsdk_pageview.h"