Get rid of most instance of 'foo != NULL'

fpdfsdk/src/pdfwindow/PWL_ScrollBar.cpp

Index: fpdfsdk/src/pdfwindow/PWL_ScrollBar.cpp
diff --git a/fpdfsdk/src/pdfwindow/PWL_ScrollBar.cpp b/fpdfsdk/src/pdfwindow/PWL_ScrollBar.cpp
index f4d4baf6e9fac8911e5123d33e361c68d5792d7f..b6a1bb3e6e88517a0696110d9f3f788d0b4cfe44 100644
--- a/fpdfsdk/src/pdfwindow/PWL_ScrollBar.cpp
+++ b/fpdfsdk/src/pdfwindow/PWL_ScrollBar.cpp
@@ -14,9 +14,6 @@
 #define IsFloatSmaller(fa, fb) ((fa) < (fb) && !IsFloatZero((fa) - (fb)))
 #define IsFloatEqual(fa, fb) IsFloatZero((fa) - (fb))
 
-/* ------------------------------- PWL_FLOATRANGE
- * ------------------------------- */
-
 PWL_FLOATRANGE::PWL_FLOATRANGE() {
   Default();
 }
@@ -49,9 +46,6 @@ FX_FLOAT PWL_FLOATRANGE::GetWidth() const {
   return fMax - fMin;
 }
 
-/* ------------------------------- PWL_SCROLL_PRIVATEDATA
- * ------------------------------- */
-
 PWL_SCROLL_PRIVATEDATA::PWL_SCROLL_PRIVATEDATA() {
   Default();
 }
@@ -113,9 +107,6 @@ void PWL_SCROLL_PRIVATEDATA::SubBig() {
     SetPos(ScrollRange.fMin);
 }
 
-/* ------------------------------- CPWL_SBButton -------------------------------
- */
-
 CPWL_SBButton::CPWL_SBButton(PWL_SCROLLBAR_TYPE eScrollBarType,
                              PWL_SBBUTTON_TYPE eButtonType) {
   m_eScrollBarType = eScrollBarType;
@@ -405,8 +396,6 @@ void CPWL_SBButton::DrawThisAppearance(CFX_RenderDevice* pDevice,
           }
         } break;
         case PSBT_POS: {
-          // CPWL_Wnd::DrawThisAppearance(pDevice,pUser2Device);
-
           // draw border
           CPDF_Rect rcDraw = rectWnd;
           CPWL_Utils::DrawStrokeRect(pDevice, pUser2Device, rcDraw,
@@ -532,14 +521,6 @@ void CPWL_SBButton::DrawThisAppearance(CFX_RenderDevice* pDevice,
 
             CPWL_Utils::DrawStrokeLine(pDevice, pUser2Device, ptLeft, ptRight,
                                        crStroke, 1.0f);
-
-            /*
-            ptLeft.y += 1.5f;
-            ptRight.y += 1.5f;
-
-            CPWL_Utils::DrawStrokeLine(pDevice, pUser2Device, ptLeft, ptRight,
-                    ArgbEncode(nTransparancy,150,150,150),1.0f);
-                    */
           }
         } break;
         default:
@@ -580,24 +561,11 @@ FX_BOOL CPWL_SBButton::OnMouseMove(const CPDF_Point& point, FX_DWORD nFlag) {
 
   if (CPWL_Wnd* pParent = GetParentWindow()) {
     pParent->OnNotify(this, PNM_MOUSEMOVE, 0, (intptr_t)&point);
-
-    /*
-    if (m_bMouseDown && (m_eSBButtonType == PSBT_MIN || m_eSBButtonType ==
-    PSBT_MAX))
-    {
-            if
-    (!pParent->OnNotify(this,PNM_LBUTTONDOWN,nFlags,(intptr_t)&point))
-                    return FALSE;
-    }
-    */
   }
 
   return TRUE;
 }
 
-/* ------------------------------- CPWL_ScrollBar
- * ---------------------------------- */
-
 CPWL_ScrollBar::CPWL_ScrollBar(PWL_SCROLLBAR_TYPE sbType)
     : m_sbType(sbType),
       m_pMinButton(NULL),
@@ -923,9 +891,8 @@ void CPWL_ScrollBar::SetScrollStep(FX_FLOAT fBigStep, FX_FLOAT fSmallStep) {
 }
 
 void CPWL_ScrollBar::MovePosButton(FX_BOOL bRefresh) {
-  ASSERT(m_pPosButton != NULL);
-  ASSERT(m_pMinButton != NULL);
-  ASSERT(m_pMaxButton != NULL);
+  ASSERT(m_pMinButton);
+  ASSERT(m_pMaxButton);
 
   if (m_pPosButton->IsVisible()) {
     CPDF_Rect rcClient;