Remove more unneeded STL #includes from headers.

Remove some variables named "string" to avoid false positives from the
linter.

Change-Id: I00a53e6970451fd0cea8ab2f8178183650ca00d2
Reviewed-on: https://pdfium-review.googlesource.com/42810
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
diff --git a/fxjs/cjs_delaydata.h b/fxjs/cjs_delaydata.h
index deeb65d..f4c7820 100644
--- a/fxjs/cjs_delaydata.h
+++ b/fxjs/cjs_delaydata.h
@@ -7,7 +7,6 @@
 #ifndef FXJS_CJS_DELAYDATA_H_
 #define FXJS_CJS_DELAYDATA_H_
 
-#include <string>
 #include <vector>
 
 #include "core/fxcrt/fx_coordinates.h"
@@ -24,7 +23,7 @@
   WideString sFieldName;
   int32_t num;
   bool b;
-  ByteString string;
+  ByteString bytestring;
   WideString widestring;
   CFX_FloatRect rect;
   CFX_Color color;