Make CFX_WideString::FromUTF8() take a CFX_ByteStringC argument.

fpdfsdk/jsapi/fxjs_v8.cpp

Index: fpdfsdk/jsapi/fxjs_v8.cpp
diff --git a/fpdfsdk/jsapi/fxjs_v8.cpp b/fpdfsdk/jsapi/fxjs_v8.cpp
index 034f2c6642356a3b1f7c658992d7ed752440728c..e49eb45ce1f502954aa5e303724dd592237b576b 100644
--- a/fpdfsdk/jsapi/fxjs_v8.cpp
+++ b/fpdfsdk/jsapi/fxjs_v8.cpp
@@ -807,7 +807,7 @@ CFX_WideString FXJS_ToString(v8::Isolate* pIsolate,
     return L"";
   v8::Local<v8::Context> context = pIsolate->GetCurrentContext();
   v8::String::Utf8Value s(pValue->ToString(context).ToLocalChecked());
-  return CFX_WideString::FromUTF8(*s, s.length());
+  return CFX_WideString::FromUTF8(CFX_ByteStringC(*s, s.length()));
 }
 
 v8::Local<v8::Array> FXJS_ToArray(v8::Isolate* pIsolate,