Use pdfium::Optional in CJS_Return.

Change-Id: Idfe70f86fbaf341ba6b197689a65ac722e671f39
Reviewed-on: https://pdfium-review.googlesource.com/37674
Reviewed-by: dsinclair <dsinclair@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>

2 files changed, 7 insertions, 8 deletions

diff --git a/fxjs/cjs_return.cpp b/fxjs/cjs_return.cpp
index 53ac5c0a28..49ad54ab07 100644
--- a/fxjs/cjs_return.cpp
+++ b/fxjs/cjs_return.cpp
@@ -6,12 +6,11 @@
 
 #include "fxjs/cjs_return.h"
 
-CJS_Return::CJS_Return() : is_error_(false) {}
+CJS_Return::CJS_Return() {}
 
-CJS_Return::CJS_Return(v8::Local<v8::Value> ret)
-    : is_error_(false), return_(ret) {}
+CJS_Return::CJS_Return(v8::Local<v8::Value> ret) : return_(ret) {}
 
-CJS_Return::CJS_Return(const WideString& err) : is_error_(true), error_(err) {}
+CJS_Return::CJS_Return(const WideString& err) : error_(err) {}
 
 CJS_Return::CJS_Return(JSMessage id) : CJS_Return(JSGetStringFromID(id)) {}
 
diff --git a/fxjs/cjs_return.h b/fxjs/cjs_return.h
index df3c8519bd..b165f3f11c 100644
--- a/fxjs/cjs_return.h
+++ b/fxjs/cjs_return.h
@@ -9,6 +9,7 @@
 
 #include "fxjs/cfxjs_engine.h"
 #include "fxjs/js_resources.h"
+#include "third_party/base/optional.h"
 
 class CJS_Return {
  public:
@@ -19,15 +20,14 @@ class CJS_Return {
   CJS_Return(const CJS_Return&);
   ~CJS_Return();
 
-  bool HasError() const { return is_error_; }
-  WideString Error() const { return error_; }
+  bool HasError() const { return error_.has_value(); }
+  WideString Error() const { return error_.value(); }
 
   bool HasReturn() const { return !return_.IsEmpty(); }
   v8::Local<v8::Value> Return() const { return return_; }
 
  private:
-  bool is_error_ = false;
-  WideString error_;
+  Optional<WideString> error_;
   v8::Local<v8::Value> return_;
 };