Fix XFA compilation noise, part 1.

xfa/src/fwl/src/core/fwl_noteimp.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "../../../foxitlib.h"
 #include "include/fwl_targetimp.h"
 #include "include/fwl_widgetimp.h"
 #include "include/fwl_widgetmgrimp.h"
@@ skipping 75 matching lines @@
   IFWL_NoteThread* pThread = m_pForm->GetOwnerThread();
   _FWL_RETURN_IF_FAIL(pThread);
   IFWL_NoteDriver* pDriver = pThread->GetNoteDriver();
   _FWL_RETURN_IF_FAIL(pDriver);
   pDriver->SendNote(&ev);
 }
 CFWL_NoteDriver::CFWL_NoteDriver()
     : m_sendEventCalled(0),
       m_maxSize(500),
       m_bFullScreen(FALSE),
-      m_pFocus(NULL),
-      m_pHover(NULL),
-      m_pGrab(NULL),
-      m_hook(NULL) {
+      m_pHover(nullptr),
+      m_pFocus(nullptr),
+      m_pGrab(nullptr),
+      m_hook(nullptr) {
   m_pNoteLoop = new CFWL_NoteLoop;
   PushNoteLoop((IFWL_NoteLoop*)m_pNoteLoop);
 }
 CFWL_NoteDriver::~CFWL_NoteDriver() {
   if (m_pNoteLoop) {
     delete m_pNoteLoop;
     m_pNoteLoop = NULL;
   }
   ClearInvalidEventTargets(TRUE);
 }
@@ skipping 103 matching lines @@
 }
 FX_BOOL CFWL_NoteDriver::SetFocus(IFWL_Widget* pFocus, FX_BOOL bNotify) {
   if (m_pFocus == pFocus) {
     return TRUE;
   }
   IFWL_Widget* pPrev = m_pFocus;
   m_pFocus = pFocus;
   if (pPrev) {
     IFWL_Widget* pWidget =
         FWL_GetWidgetMgr()->GetWidget(m_pFocus, FWL_WGTRELATION_SystemForm);
-    CFWL_FormImp* pForm =
-        pWidget ? (CFWL_FormImp*)((IFWL_TargetData*)pWidget)->GetData() : NULL;
     CFWL_MsgKillFocus ms;
     ms.m_pDstTarget = pPrev;
     ms.m_pSrcTarget = pPrev;
     if (bNotify) {
       ms.m_dwExtend = 1;
     }
     IFWL_WidgetDelegate* pDelegate = pPrev->SetDelegate(NULL);
     if (pDelegate) {
       pDelegate->OnProcessMessage(&ms);
     }
@@ skipping 838 matching lines @@
   _FWL_RETURN_VALUE_IF_FAIL(widget, NULL);
   return widget->GetInterface();
 }
 FWL_ERR FWL_SetHook(IFWL_NoteDriver* driver,
                     FWLMessageHookCallback callback,
                     void* info) {
   CFWL_NoteDriver* noteDriver = (CFWL_NoteDriver*)driver;
   noteDriver->SetHook(callback, info);
   return FWL_ERR_Succeeded;
 }