Mass conversion of remaining class members (non-xfa)

Change-Id: I8365ba80e3395d59a3cf35dbd9d9162e86e712e3
Reviewed-on: https://pdfium-review.googlesource.com/5970
Commit-Queue: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
diff --git a/fpdfsdk/formfiller/cffl_checkbox.cpp b/fpdfsdk/formfiller/cffl_checkbox.cpp
index c233c13..323dcf4 100644
--- a/fpdfsdk/formfiller/cffl_checkbox.cpp
+++ b/fpdfsdk/formfiller/cffl_checkbox.cpp
@@ -48,7 +48,7 @@
 
       bool bReset = false;
       bool bExit = false;
-      CPDFSDK_Annot::ObservedPtr pObserved(m_pWidget);
+      CPDFSDK_Annot::ObservedPtr pObserved(m_pWidget.Get());
       m_pFormFillEnv->GetInteractiveFormFiller()->OnButtonUp(
           &pObserved, pPageView, bReset, bExit, nFlags);
       if (!pObserved) {