Remove a CFWL_MessageKillFocus ctor.

Consistently use the other ctor.

Change-Id: I20dc4860a8b91304119c3fd90c90f9e06f7e5a97
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/86630
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
diff --git a/xfa/fwl/cfwl_combobox.cpp b/xfa/fwl/cfwl_combobox.cpp
index c1081dc..048008e 100644
--- a/xfa/fwl/cfwl_combobox.cpp
+++ b/xfa/fwl/cfwl_combobox.cpp
@@ -482,7 +482,7 @@
 void CFWL_ComboBox::OnFocusLost() {
   m_Properties.m_dwStates &= ~FWL_STATE_WGT_Focused;
   HideDropDownList();
-  CFWL_MessageKillFocus msg(m_pEdit);
+  CFWL_MessageKillFocus msg(m_pEdit, nullptr);
   m_pEdit->GetDelegate()->OnProcessMessage(&msg);
 }
 
diff --git a/xfa/fwl/cfwl_messagekillfocus.cpp b/xfa/fwl/cfwl_messagekillfocus.cpp
index 58f9fbb..cbe0f5e 100644
--- a/xfa/fwl/cfwl_messagekillfocus.cpp
+++ b/xfa/fwl/cfwl_messagekillfocus.cpp
@@ -6,9 +6,6 @@
 
 #include "xfa/fwl/cfwl_messagekillfocus.h"
 
-CFWL_MessageKillFocus::CFWL_MessageKillFocus(CFWL_Widget* pSrcTarget)
-    : CFWL_MessageKillFocus(pSrcTarget, nullptr) {}
-
 CFWL_MessageKillFocus::CFWL_MessageKillFocus(CFWL_Widget* pSrcTarget,
                                              CFWL_Widget* pDstTarget)
     : CFWL_Message(CFWL_Message::Type::kKillFocus, pSrcTarget, pDstTarget) {}
diff --git a/xfa/fwl/cfwl_messagekillfocus.h b/xfa/fwl/cfwl_messagekillfocus.h
index 0f1a71b..26fd04f 100644
--- a/xfa/fwl/cfwl_messagekillfocus.h
+++ b/xfa/fwl/cfwl_messagekillfocus.h
@@ -12,7 +12,6 @@
 
 class CFWL_MessageKillFocus final : public CFWL_Message {
  public:
-  explicit CFWL_MessageKillFocus(CFWL_Widget* pSrcTarget);
   CFWL_MessageKillFocus(CFWL_Widget* pSrcTarget, CFWL_Widget* pDstTarget);
   ~CFWL_MessageKillFocus() override;