Remove include only fwl.h and IWYU.

xfa/src/fwl/src/theme/pictureboxtp.cpp

Index: xfa/src/fwl/src/theme/pictureboxtp.cpp
diff --git a/xfa/src/fwl/src/theme/pictureboxtp.cpp b/xfa/src/fwl/src/theme/pictureboxtp.cpp
index ff1706545dadacfb8e54bf788488ca7246015f87..0a373bdcb142f973a116cf1824bf0bedbe74e179 100644
--- a/xfa/src/fwl/src/theme/pictureboxtp.cpp
+++ b/xfa/src/fwl/src/theme/pictureboxtp.cpp
@@ -4,9 +4,15 @@
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
+#include "xfa/include/fwl/theme/pictureboxtp.h"
+
+#include "xfa/include/fwl/basewidget/fwl_picturebox.h"
+#include "xfa/include/fwl/core/fwl_widget.h"
 #include "xfa/src/foxitlib.h"
+
 CFWL_PictureBoxTP::CFWL_PictureBoxTP() {}
 CFWL_PictureBoxTP::~CFWL_PictureBoxTP() {}
+
 FX_BOOL CFWL_PictureBoxTP::IsValidWidget(IFWL_Widget* pWidget) {
   if (!pWidget)
     return FALSE;