From 2474a3b2d9fe987dac58813771f1fa66427e124f Mon Sep 17 00:00:00 2001
From: dan sinclair <dsinclair@chromium.org>
Date: Tue, 24 Oct 2017 21:50:21 -0400
Subject: Only set return value if one provided

This CL updates the javascript methods to only set the return value if the
v8::Local is not empty.
Change-Id: I1e0cac2d024671c3e217cb1b2292c40ed62484a4
Reviewed-on: https://pdfium-review.googlesource.com/16731
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: dsinclair <dsinclair@chromium.org>
---
 fpdfsdk/javascript/JS_Define.h | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/fpdfsdk/javascript/JS_Define.h b/fpdfsdk/javascript/JS_Define.h
index 819cc9c25e..39346135c5 100644
--- a/fpdfsdk/javascript/JS_Define.h
+++ b/fpdfsdk/javascript/JS_Define.h
@@ -58,7 +58,8 @@ void JSPropGetter(const char* prop_name_string,
         JSFormatErrorString(class_name_string, prop_name_string, sError));
     return;
   }
-  info.GetReturnValue().Set(prop_value.ToV8Value());
+  if (!prop_value.ToV8Value().IsEmpty())
+    info.GetReturnValue().Set(prop_value.ToV8Value());
 }
 
 template <class C,
@@ -131,7 +132,8 @@ void JSMethod(const char* method_name_string,
         JSFormatErrorString(class_name_string, method_name_string, sError));
     return;
   }
-  info.GetReturnValue().Set(valueRes.ToV8Value());
+  if (!valueRes.ToV8Value().IsEmpty())
+    info.GetReturnValue().Set(valueRes.ToV8Value());
 }
 
 #define JS_STATIC_METHOD(method_name, class_name)                             \
-- 
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