Fix some IWYU issues in xfa/fxfa/.

Change-Id: Ia002b26d70f5d6e5b66a3341978483636f943db8
Reviewed-on: https://pdfium-review.googlesource.com/40672
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: Ryan Harrison <rharrison@chromium.org>

xfa/fxfa/cxfa_textprovider.h

diff --git a/xfa/fxfa/cxfa_textprovider.h b/xfa/fxfa/cxfa_textprovider.h
index 8c69227..4f349e4 100644
--- a/xfa/fxfa/cxfa_textprovider.h
+++ b/xfa/fxfa/cxfa_textprovider.h
@@ -9,10 +9,10 @@
 
 #include "core/fxcrt/fx_string.h"
 #include "xfa/fxfa/cxfa_textlayout.h"
-#include "xfa/fxfa/parser/cxfa_node.h"
 
 class CXFA_Font;
 class CXFA_Node;
+class CXFA_Para;
 
 enum XFA_TEXTPROVIDERTYPE {
   XFA_TEXTPROVIDERTYPE_Text,

xfa/fxfa/parser/cxfa_barcode.h

diff --git a/xfa/fxfa/parser/cxfa_barcode.h b/xfa/fxfa/parser/cxfa_barcode.h
index 0899740..463e97f 100644
--- a/xfa/fxfa/parser/cxfa_barcode.h
+++ b/xfa/fxfa/parser/cxfa_barcode.h
@@ -7,6 +7,8 @@
 #ifndef XFA_FXFA_PARSER_CXFA_BARCODE_H_
 #define XFA_FXFA_PARSER_CXFA_BARCODE_H_
 
+#include "fxbarcode/BC_Library.h"
+#include "third_party/base/optional.h"
 #include "xfa/fxfa/parser/cxfa_node.h"
 
 class CXFA_Barcode : public CXFA_Node {

xfa/fxfa/parser/cxfa_node.h

diff --git a/xfa/fxfa/parser/cxfa_node.h b/xfa/fxfa/parser/cxfa_node.h
index 72e2a4e..6b179b3 100644
--- a/xfa/fxfa/parser/cxfa_node.h
+++ b/xfa/fxfa/parser/cxfa_node.h
@@ -13,10 +13,8 @@
 #include <vector>
 
 #include "core/fxcrt/fx_string.h"
-#include "core/fxcrt/maybe_owned.h"
 #include "core/fxcrt/xml/cfx_xmlnode.h"
 #include "core/fxge/fx_dib.h"
-#include "fxbarcode/BC_Library.h"
 #include "third_party/base/optional.h"
 #include "xfa/fxfa/cxfa_ffwidget.h"
 #include "xfa/fxfa/parser/cxfa_object.h"

xfa/fxfa/parser/cxfa_thisproxy.h

diff --git a/xfa/fxfa/parser/cxfa_thisproxy.h b/xfa/fxfa/parser/cxfa_thisproxy.h
index 197a97d..f429a2c 100644
--- a/xfa/fxfa/parser/cxfa_thisproxy.h
+++ b/xfa/fxfa/parser/cxfa_thisproxy.h
@@ -8,9 +8,10 @@
 #define XFA_FXFA_PARSER_CXFA_THISPROXY_H_
 
 #include "core/fxcrt/unowned_ptr.h"
-#include "xfa/fxfa/parser/cxfa_node.h"
 #include "xfa/fxfa/parser/cxfa_object.h"
 
+class CXFA_Node;
+
 class CXFA_ThisProxy : public CXFA_Object {
  public:
   CXFA_ThisProxy(CXFA_Node* pThisNode, CXFA_Node* pScriptNode);

xfa/fxfa/parser/cxfa_traversestrategy_xfacontainernode.h

diff --git a/xfa/fxfa/parser/cxfa_traversestrategy_xfacontainernode.h b/xfa/fxfa/parser/cxfa_traversestrategy_xfacontainernode.h
index 3ca632a..d867f9f 100644
--- a/xfa/fxfa/parser/cxfa_traversestrategy_xfacontainernode.h
+++ b/xfa/fxfa/parser/cxfa_traversestrategy_xfacontainernode.h
@@ -23,8 +23,8 @@
   }
 };
 
-typedef CXFA_NodeIteratorTemplate<CXFA_Node,
-                                  CXFA_TraverseStrategy_XFAContainerNode>
-    CXFA_ContainerIterator;
+using CXFA_ContainerIterator =
+    CXFA_NodeIteratorTemplate<CXFA_Node,
+                              CXFA_TraverseStrategy_XFAContainerNode>;
 
 #endif  // XFA_FXFA_PARSER_CXFA_TRAVERSESTRATEGY_XFACONTAINERNODE_H_