Remove include only fwl.h and IWYU.

xfa/src/fwl/src/lightwidget/caret.cpp

Index: xfa/src/fwl/src/lightwidget/caret.cpp
diff --git a/xfa/src/fwl/src/lightwidget/caret.cpp b/xfa/src/fwl/src/lightwidget/caret.cpp
index f68d11ddc77d4d1c7186a11d219bfa4ae9d8cf06..a7a7702ab64bb8548e16ef541b6981c5589798e3 100644
--- a/xfa/src/fwl/src/lightwidget/caret.cpp
+++ b/xfa/src/fwl/src/lightwidget/caret.cpp
@@ -4,9 +4,14 @@
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
+#include "xfa/include/fwl/lightwidget/caret.h"
+
 #include <memory>
 
+#include "xfa/include/fwl/basewidget/fwl_caret.h"
+#include "xfa/include/fwl/lightwidget/edit.h"
 #include "xfa/src/foxitlib.h"
+#include "xfa/src/fwl/src/core/include/fwl_targetimp.h"
 
 CFWL_Caret* CFWL_Caret::Create() {
   return new CFWL_Caret;