commit 5daf07afe5b76e702d053aaca648b977ec3bb663
author dan sinclair <dsinclair@chromium.org> Tue Oct 24 21:46:57 2017 -0400
committer Chromium commit bot <commit-bot@chromium.org> Wed Oct 25 18:14:23 2017 +0000
tree 7f7d36eabd41737fce559d25adf7a17046c9f007
parent 80435cb746fa7bd22cf062ab39829ec86000fd21

Make NewNull return an actual Null

This CL updates the CFXJS_Engine::NewNull method to return a real v8::Null
instead of an empty v8::Local. This also adds a NewUndefined and returns
undefined in most of the places null was returned previously.

Change-Id: If1a96bf253057892a3b709cbc72f8825c52503c3
Reviewed-on: https://pdfium-review.googlesource.com/16730
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: dsinclair <dsinclair@chromium.org>

fpdfsdk/javascript/global.cpp

diff --git a/fpdfsdk/javascript/global.cpp b/fpdfsdk/javascript/global.cpp
index 040c6e6..5dc6ac9 100644
--- a/fpdfsdk/javascript/global.cpp
+++ b/fpdfsdk/javascript/global.cpp
@@ -109,7 +109,8 @@
     pRuntime->Error(JSFormatErrorString(class_name, "GetProperty", L""));
     return;
   }
-  info.GetReturnValue().Set(value.ToV8Value());
+  if (!value.ToV8Value().IsEmpty())
+    info.GetReturnValue().Set(value.ToV8Value());
 }
 
 template <class Alt>
@@ -284,16 +285,12 @@
                                     const wchar_t* propname,
                                     CJS_Value* vp) {
   auto it = m_MapGlobal.find(ByteString::FromUnicode(propname));
-  if (it == m_MapGlobal.end()) {
-    vp->Set(pRuntime->NewNull());
+  if (it == m_MapGlobal.end())
     return true;
-  }
 
   JSGlobalData* pData = it->second.get();
-  if (pData->bDeleted) {
-    vp->Set(pRuntime->NewNull());
+  if (pData->bDeleted)
     return true;
-  }
 
   switch (pData->nType) {
     case JS_GlobalDataType::NUMBER: