Remove FWL globals.

xfa/fwl/core/ifwl_pushbutton.h

Index: xfa/fwl/core/ifwl_pushbutton.h
diff --git a/xfa/fwl/core/ifwl_pushbutton.h b/xfa/fwl/core/ifwl_pushbutton.h
index 8906aa898f0d6a0c09d9ce7fad36f1a789288b25..6a4d28ddbabc8a50f610406bda7907ce0c45d9b9 100644
--- a/xfa/fwl/core/ifwl_pushbutton.h
+++ b/xfa/fwl/core/ifwl_pushbutton.h
@@ -40,13 +40,14 @@ class IFWL_PushButtonDP : public IFWL_DataProvider {
 
 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
-  FWL_Type GetClassID() const override;
-  FWL_Error Initialize() override;
+  void Initialize() override;
   void Finalize() override;
+  FWL_Type GetClassID() const 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;