Use smart pointers for class owned pointers in xfa/fwl/theme

xfa/fwl/theme/cfwl_pushbuttontp.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 "xfa/fwl/theme/cfwl_pushbuttontp.h"
 
 #include "xfa/fwl/basewidget/ifwl_pushbutton.h"
 #include "xfa/fwl/core/cfwl_themebackground.h"
 #include "xfa/fwl/core/ifwl_themeprovider.h"
 #include "xfa/fwl/core/ifwl_widget.h"
 #include "xfa/fxgraphics/cfx_color.h"
 #include "xfa/fxgraphics/cfx_path.h"
 
 #define PUSHBUTTON_SIZE_Corner 2
 
 CFWL_PushButtonTP::CFWL_PushButtonTP() : m_pThemeData(new PBThemeData) {
   SetThemeData(0);
 }
 
-CFWL_PushButtonTP::~CFWL_PushButtonTP() {
-  delete m_pThemeData;
-}
+CFWL_PushButtonTP::~CFWL_PushButtonTP() {}
 
 bool CFWL_PushButtonTP::IsValidWidget(IFWL_Widget* pWidget) {
   return pWidget && pWidget->GetClassID() == FWL_Type::PushButton;
 }
 uint32_t CFWL_PushButtonTP::SetThemeID(IFWL_Widget* pWidget,
                                        uint32_t dwThemeID,
                                        FX_BOOL bChildren) {
   SetThemeData(FWL_GetThemeColor(dwThemeID));
   return CFWL_WidgetTP::SetThemeID(pWidget, dwThemeID, bChildren);
 }
@@ skipping 113 matching lines @@
     m_pThemeData->clrEnd[2] = ArgbEncode(255, 229, 151, 0);
     m_pThemeData->clrEnd[3] = ArgbEncode(255, 105, 130, 238);
     m_pThemeData->clrEnd[4] = ArgbEncode(255, 245, 244, 234);
     m_pThemeData->clrFill[0] = ArgbEncode(255, 255, 255, 255);
     m_pThemeData->clrFill[1] = ArgbEncode(255, 226, 225, 218);
     m_pThemeData->clrFill[2] = ArgbEncode(255, 255, 255, 255);
     m_pThemeData->clrFill[3] = ArgbEncode(255, 255, 255, 255);
     m_pThemeData->clrFill[4] = ArgbEncode(255, 245, 244, 234);
   }
 }
-int32_t CFWL_PushButtonTP::GetColorID(uint32_t dwStates) {
+int32_t CFWL_PushButtonTP::GetColorID(uint32_t dwStates) const {
   int32_t color = 0;
   if (dwStates & CFWL_PartState_Disabled)
     color += 4;
   if (dwStates & CFWL_PartState_Default) {
     color += 3;
   } else {
     if (dwStates & CFWL_PartState_Hovered)
       color += 2;
     if (dwStates & CFWL_PartState_Pressed)
       color += 1;
   }
   return color;
 }