Remove FWL globals.

xfa/fwl/core/ifwl_pushbutton.h

 // 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
 
 #ifndef XFA_FWL_CORE_IFWL_PUSHBUTTON_H_
 #define XFA_FWL_CORE_IFWL_PUSHBUTTON_H_
 
 #include "xfa/fwl/core/cfwl_widgetimpproperties.h"
@@ skipping 22 matching lines @@
 class CFX_DIBitmap;
 class IFWL_Widget;
 
 class IFWL_PushButtonDP : public IFWL_DataProvider {
  public:
   virtual CFX_DIBitmap* GetPicture(IFWL_Widget* pWidget) = 0;
 };
 
 class IFWL_PushButton : public IFWL_Widget {
  public:
-  IFWL_PushButton(const CFWL_WidgetImpProperties& properties);
+  IFWL_PushButton(const IFWL_App* app,
+                  const CFWL_WidgetImpProperties& properties);
   ~IFWL_PushButton() override;
 
   // IFWL_Widget
+  void Initialize() override;
+  void Finalize() override;
   FWL_Type GetClassID() const override;
-  FWL_Error Initialize() override;
-  void Finalize() override;
   FWL_Error GetWidgetRect(CFX_RectF& rect, FX_BOOL bAutoSize = FALSE) override;
   void SetStates(uint32_t dwStates, FX_BOOL bSet = TRUE) override;
   FWL_Error Update() override;
   FWL_Error DrawWidget(CFX_Graphics* pGraphics,
                        const CFX_Matrix* pMatrix = nullptr) override;
 
  protected:
   friend class CFWL_PushButtonImpDelegate;
 
   void DrawBkground(CFX_Graphics* pGraphics,
@@ skipping 24 matching lines @@
   void OnFocusChanged(CFWL_Message* pMsg, FX_BOOL bSet = TRUE);
   void OnLButtonDown(CFWL_MsgMouse* pMsg);
   void OnLButtonUp(CFWL_MsgMouse* pMsg);
   void OnMouseMove(CFWL_MsgMouse* pMsg);
   void OnMouseLeave(CFWL_MsgMouse* pMsg);
   void OnKeyDown(CFWL_MsgKey* pMsg);
   IFWL_PushButton* m_pOwner;
 };
 
 #endif  // XFA_FWL_CORE_IFWL_PUSHBUTTON_H_