Move third_party/base/span.h to core/fxcrt

Fix some GN build rules to make the build work after moving.

Bug: pdfium:2127
Change-Id: Ic8cf0860dc5df8a510ecb34de1ffd10514d86c26
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/116650
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Thomas Sepez <tsepez@google.com>
Commit-Queue: Lei Zhang <thestig@chromium.org>
diff --git a/fxjs/cjs_console.cpp b/fxjs/cjs_console.cpp
index 883c1d4..61eca47 100644
--- a/fxjs/cjs_console.cpp
+++ b/fxjs/cjs_console.cpp
@@ -8,10 +8,10 @@
 
 #include <vector>
 
+#include "core/fxcrt/span.h"
 #include "fxjs/cjs_event_context.h"
 #include "fxjs/cjs_object.h"
 #include "fxjs/js_define.h"
-#include "third_party/base/containers/span.h"
 
 const JSMethodSpec CJS_Console::MethodSpecs[] = {{"clear", clear_static},
                                                  {"hide", hide_static},