Add a default context name to RCTJSCExecutor

Reviewed By: mmmulani

Differential Revision: D4015748

fbshipit-source-id: 077287b8438aa13f2a1479d68eacb0662bf295aa

ReactCommon/cxxreact/JSCExecutor.cpp

@@ -200,6 +200,11 @@ void JSCExecutor::destroy() {
   });
 }
 
+void JSCExecutor::setContextName(const std::string& name) {
+  String jsName = String(name.c_str());
+  JSGlobalContextSetName(m_context, static_cast<JSStringRef>(jsName));
+}
+
 void JSCExecutor::initOnJSVMThread() throw(JSException) {
   SystraceSection s("JSCExecutor.initOnJSVMThread");