Get rid of NULLs in fpdfsdk/

fpdfsdk/pdfwindow/PWL_ScrollBar.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 "fpdfsdk/pdfwindow/PWL_ScrollBar.h"
 
 #include "core/fxge/include/fx_ge.h"
 #include "fpdfsdk/pdfwindow/PWL_Utils.h"
@@ skipping 255 matching lines @@
           if (rectWnd.right - rectWnd.left > PWL_TRIANGLE_HALFLEN * 2 &&
               rectWnd.top - rectWnd.bottom > PWL_TRIANGLE_HALFLEN) {
             CFX_PathData path;
 
             path.SetPointCount(4);
             path.SetPoint(0, pt1.x, pt1.y, FXPT_MOVETO);
             path.SetPoint(1, pt2.x, pt2.y, FXPT_LINETO);
             path.SetPoint(2, pt3.x, pt3.y, FXPT_LINETO);
             path.SetPoint(3, pt1.x, pt1.y, FXPT_LINETO);
 
-            pDevice->DrawPath(&path, pUser2Device, NULL,
+            pDevice->DrawPath(&path, pUser2Device, nullptr,
                               CPWL_Utils::PWLColorToFXColor(
                                   PWL_DEFAULT_BLACKCOLOR, nTransparancy),
                               0, FXFILL_ALTERNATE);
           }
         } break;
         case PSBT_MAX: {
           CFX_FloatPoint pt1(ptCenter.x + PWL_TRIANGLE_HALFLEN * 0.5f,
                              ptCenter.y);
           CFX_FloatPoint pt2(ptCenter.x - PWL_TRIANGLE_HALFLEN * 0.5f,
                              ptCenter.y + PWL_TRIANGLE_HALFLEN);
           CFX_FloatPoint pt3(ptCenter.x - PWL_TRIANGLE_HALFLEN * 0.5f,
                              ptCenter.y - PWL_TRIANGLE_HALFLEN);
 
           if (rectWnd.right - rectWnd.left > PWL_TRIANGLE_HALFLEN * 2 &&
               rectWnd.top - rectWnd.bottom > PWL_TRIANGLE_HALFLEN) {
             CFX_PathData path;
 
             path.SetPointCount(4);
             path.SetPoint(0, pt1.x, pt1.y, FXPT_MOVETO);
             path.SetPoint(1, pt2.x, pt2.y, FXPT_LINETO);
             path.SetPoint(2, pt3.x, pt3.y, FXPT_LINETO);
             path.SetPoint(3, pt1.x, pt1.y, FXPT_LINETO);
 
-            pDevice->DrawPath(&path, pUser2Device, NULL,
+            pDevice->DrawPath(&path, pUser2Device, nullptr,
                               CPWL_Utils::PWLColorToFXColor(
                                   PWL_DEFAULT_BLACKCOLOR, nTransparancy),
                               0, FXFILL_ALTERNATE);
           }
         } break;
         default:
           break;
       }
       break;
     case SBT_VSCROLL:
@@ skipping 261 matching lines @@
 
   if (CPWL_Wnd* pParent = GetParentWindow()) {
     pParent->OnNotify(this, PNM_MOUSEMOVE, 0, (intptr_t)&point);
   }
 
   return TRUE;
 }
 
 CPWL_ScrollBar::CPWL_ScrollBar(PWL_SCROLLBAR_TYPE sbType)
     : m_sbType(sbType),
-      m_pMinButton(NULL),
-      m_pMaxButton(NULL),
-      m_pPosButton(NULL),
+      m_pMinButton(nullptr),
+      m_pMaxButton(nullptr),
+      m_pPosButton(nullptr),
       m_bMouseDown(FALSE),
       m_bMinOrMax(FALSE),
       m_bNotifyForever(TRUE) {}
 
 CPWL_ScrollBar::~CPWL_ScrollBar() {}
 
 CFX_ByteString CPWL_ScrollBar::GetClassName() const {
   return "CPWL_ScrollBar";
 }
 
@@ skipping 596 matching lines @@
   if (m_bMinOrMax)
     m_sData.SubSmall();
   else
     m_sData.AddSmall();
 
   if (FXSYS_memcmp(&m_sData, &sTemp, sizeof(PWL_SCROLL_PRIVATEDATA)) != 0) {
     MovePosButton(TRUE);
     NotifyScrollWindow();
   }
 }