electron: 5.0.0-beta.1
platform: linux x64

**Actual behavior**

https://github.com/electron/electron-quick-start app fails to start with the following error:
```
[3937:0131/003107.790938:FATAL:zygote_host_impl_linux.cc(116)] No usable sandbox! Update your kernel or see https://chromium.googlesource.com/chromium/src/+/master/docs/linux_suid_sandbox_development.md for more information on developing with the SUID sandbox. If you want to live dangerously and need an immediate workaround, you can try using --no-sandbox.
```

**To Reproduce**

- `git clone https://github.com/electron/electron-quick-start.git`
- `cd electron-quick-start`
- `npm install`
- `npm add --only=dev electron@5.0.0-beta.1`
- any of the following commands fail:
  - `npm start`
  - `node_modules/.bin/electron --version`

**Additional Information**

Worth to mention that event just `node_modules/.bin/electron --version` execution fails with the same error.

CC @nornagon
atom/app/atom_main_delegate.cc
#include "atom/utility/atom_content_utility_client.h"
#include "base/command_line.h"
#include "base/debug/stack_trace.h"
#include "base/environment.h"
#include "base/logging.h"
#include "base/mac/bundle_locations.h"
#include "base/path_service.h"
#include "chrome/common/chrome_paths.h"
#include "content/public/common/content_switches.h"
#include "electron/buildflags/buildflags.h"
#include "ipc/ipc_buildflags.h"
#include "services/service_manager/embedder/switches.h"
#include "services/service_manager/sandbox/switches.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/base/resource/resource_bundle.h"
#include "ui/base/ui_base_switches.h"
#if BUILDFLAG(IPC_MESSAGE_LOG_ENABLED)
#define IPC_MESSAGE_MACROS_LOG_ENABLED
#include "content/public/common/content_ipc_logging.h"
#define IPC_LOG_TABLE_ADD_ENTRY(msg_id, logger) \
  content::RegisterIPCLogger(msg_id, logger)
#include "atom/common/common_message_generator.h"
#endif
#if defined(OS_MACOSX)
#include "atom/app/atom_main_delegate_mac.h"
#endif
namespace atom {
namespace {
const char* kRelauncherProcess = "relauncher";
bool IsBrowserProcess(base::CommandLine* cmd) {