Rename xfa_doclayout and xfa_document_layout_imp files.

BUILD.gn

Index: BUILD.gn
diff --git a/BUILD.gn b/BUILD.gn
index b5b0eaef30dea7199b1ecc40dd8a150f61c8c1e7..e93046325cbcc6f0ac03deb4c93f752435a404b6 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -1355,6 +1355,10 @@ if (pdf_enable_xfa) {
       "xfa/fxfa/parser/cxfa_calculate.h",
       "xfa/fxfa/parser/cxfa_caption.cpp",
       "xfa/fxfa/parser/cxfa_caption.h",
+      "xfa/fxfa/parser/cxfa_containerlayoutitem.cpp",
+      "xfa/fxfa/parser/cxfa_containerlayoutitem.h",
+      "xfa/fxfa/parser/cxfa_contentlayoutitem.cpp",
+      "xfa/fxfa/parser/cxfa_contentlayoutitem.h",
       "xfa/fxfa/parser/cxfa_corner.h",
       "xfa/fxfa/parser/cxfa_data.cpp",
       "xfa/fxfa/parser/cxfa_data.h",
@@ -1371,6 +1375,10 @@ if (pdf_enable_xfa) {
       "xfa/fxfa/parser/cxfa_font.h",
       "xfa/fxfa/parser/cxfa_image.cpp",
       "xfa/fxfa/parser/cxfa_image.h",
+      "xfa/fxfa/parser/cxfa_layoutitem.cpp",
+      "xfa/fxfa/parser/cxfa_layoutitem.h",
+      "xfa/fxfa/parser/cxfa_layoutprocessor.cpp",
+      "xfa/fxfa/parser/cxfa_layoutprocessor.h",
       "xfa/fxfa/parser/cxfa_line.cpp",
       "xfa/fxfa/parser/cxfa_line.h",
       "xfa/fxfa/parser/cxfa_margin.cpp",
@@ -1404,6 +1412,7 @@ if (pdf_enable_xfa) {
       "xfa/fxfa/parser/cxfa_thisproxy.cpp",
       "xfa/fxfa/parser/cxfa_tooltip.cpp",
       "xfa/fxfa/parser/cxfa_tooltip.h",
+      "xfa/fxfa/parser/cxfa_traversestrategy_layoutitem.h",
       "xfa/fxfa/parser/cxfa_validate.cpp",
       "xfa/fxfa/parser/cxfa_validate.h",
       "xfa/fxfa/parser/cxfa_value.cpp",
@@ -1424,13 +1433,10 @@ if (pdf_enable_xfa) {
       "xfa/fxfa/parser/xfa_basic_data_element_script.cpp",
       "xfa/fxfa/parser/xfa_basic_data_enum.cpp",
       "xfa/fxfa/parser/xfa_basic_data_packets.cpp",
-      "xfa/fxfa/parser/xfa_doclayout.h",
       "xfa/fxfa/parser/xfa_document.h",
       "xfa/fxfa/parser/xfa_document_datamerger_imp.cpp",
       "xfa/fxfa/parser/xfa_document_datamerger_imp.h",
       "xfa/fxfa/parser/xfa_document_imp.cpp",
-      "xfa/fxfa/parser/xfa_document_layout_imp.cpp",
-      "xfa/fxfa/parser/xfa_document_layout_imp.h",
       "xfa/fxfa/parser/xfa_document_serialize.cpp",
       "xfa/fxfa/parser/xfa_document_serialize.h",
       "xfa/fxfa/parser/xfa_layout_appadapter.cpp",