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### Issue Details

* **Electron Version:**
5.0.0 to 8.0.0 beta7
* **Operating System:**
Windows 10

### Expected Behavior
The did-fail-load event should be fired.

### Actual Behavior
The did-fail-load event is not fired.

### To Reproduce
Add an event handler to the did-fail-load event.
Add an event handler to the certificate-error event and cancel the default handling. Then call the callback with false.
The did-fail-load event will not be fired.

```
mainWindow.webContents.on("certificate-error", (event, url, error, certificate, callback) => {
      event.preventDefault();
      callback(false)
});

mainWindow.webContents.on("did-fail-load", (event, url, error, certificate, callback) => {
      console.log("did-fail-load");
});
```

Electron fiddle gist:
https://gist.github.com/c1427e38bf0af9a5e78088fcea6e3c66

### Additional Information
loadURL returns a Promise, in the certificate error case this Promise will be rejected. The gist will show this too.

```
mainWindow.loadURL('https://expired.badssl.com')
  .then(() => console.log("success"))
  .catch(e => console.log("fail"))
```

shell/browser/api/electron_api_app.cc
if (Browser::Get()->is_ready()) {
    thrower.ThrowError(
        "app.enableSandbox() can only be called "
        "before app is ready");
    return;
  }
  auto* command_line = base::CommandLine::ForCurrentProcess();
  RemoveNoSandboxSwitch(command_line);
  command_line->AppendSwitch(switches::kEnableSandbox);
}
void App::SetUserAgentFallback(const std::string& user_agent) {
  ElectronBrowserClient::Get()->SetUserAgent(user_agent);
}
#if defined(OS_WIN)
bool App::IsRunningUnderARM64Translation() const {
  USHORT processMachine = 0;
  USHORT nativeMachine = 0;
  auto IsWow64Process2 = reinterpret_cast<decltype(&::IsWow64Process2)>(
      GetProcAddress(GetModuleHandle(L"kernel32.dll"), "IsWow64Process2"));
  if (IsWow64Process2 == nullptr) {
    return false;
  }
  if (!IsWow64Process2(GetCurrentProcess(), &processMachine, &nativeMachine)) {
    return false;
  }
  return nativeMachine == IMAGE_FILE_MACHINE_ARM64;
}
#endif
std::string App::GetUserAgentFallback() {