Do not check pointers before deleting them.

xfa/fwl/theme/cfwl_scrollbartp.cpp

Index: xfa/fwl/theme/cfwl_scrollbartp.cpp
diff --git a/xfa/fwl/theme/cfwl_scrollbartp.cpp b/xfa/fwl/theme/cfwl_scrollbartp.cpp
index 11326edf5923fc655121a49fc7ff96c326630ce4..0913a8daa27299d92de86b5ec9d2fe4390431445 100644
--- a/xfa/fwl/theme/cfwl_scrollbartp.cpp
+++ b/xfa/fwl/theme/cfwl_scrollbartp.cpp
@@ -15,16 +15,14 @@
 
 #define FWL_SCROLL_PawLen 12.5f
 
-CFWL_ScrollBarTP::CFWL_ScrollBarTP() {
-  m_pThemeData = new SBThemeData;
+CFWL_ScrollBarTP::CFWL_ScrollBarTP() : m_pThemeData(new SBThemeData) {
   SetThemeData(0);
 }
+
 CFWL_ScrollBarTP::~CFWL_ScrollBarTP() {
-  if (m_pThemeData) {
-    delete m_pThemeData;
-    m_pThemeData = NULL;
-  }
+  delete m_pThemeData;
 }
+
 FX_BOOL CFWL_ScrollBarTP::IsValidWidget(IFWL_Widget* pWidget) {
   if (!pWidget)
     return FALSE;