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### Preflight Checklist
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* [ x] I have read the [Contributing Guidelines](https://github.com/electron/electron/blob/master/CONTRIBUTING.md) for this project.
* [ x] I agree to follow the [Code of Conduct](https://github.com/electron/electron/blob/master/CODE_OF_CONDUCT.md) that this project adheres to.
* [ x] I have searched the issue tracker for an issue that matches the one I want to file, without success.

### Issue Details

* **Electron Version:**
  * <!-- (output of `node_modules/.bin/electron --version`) e.g. 4.0.3 --> 10.1.1
* **Operating System:**
  * <!-- (Platform and Version) e.g. macOS 10.13.6 / Windows 10 (1803) / Ubuntu 18.04 x64 --> Windows 10
* **Last Known Working Electron version:**
  * <!-- (if applicable) e.g. 3.1.0 --> 6.1.10

### Expected Behavior
<!-- A clear and concise description of what you expected to happen. -->

The request to function normally except the certificate handler works as intended.

### Actual Behavior
<!-- A clear and concise description of what actually happened. -->

When sending concurrent requests at once, the net request throws an error with net::ERR_CERT_DATABASE_CHANGED.

### To Reproduce

session.setCertificateVerifyProc((r, cb) => cb(0));

// Send net requests as normal

Soon enough, the code will start producing the error shown above.

shell/browser/api/electron_api_session.cc
namespace electron {
namespace api {
namespace {
const char kPersistPrefix[] = "persist:";
void DownloadIdCallback(content::DownloadManager* download_manager,
                        const base::FilePath& path,
                        const std::vector<GURL>& url_chain,
                        const std::string& mime_type,
                        int64_t offset,
                        int64_t length,
                        const std::string& last_modified,
                        const std::string& etag,
                        const base::Time& start_time,
                        uint32_t id) {
  download_manager->CreateDownloadItem(
      base::GenerateGUID(), id, path, path, url_chain, GURL(), GURL(), GURL(),
      GURL(), base::nullopt, mime_type, mime_type, start_time, base::Time(),
      etag, last_modified, offset, length, std::string(),
      download::DownloadItem::INTERRUPTED,
      download::DOWNLOAD_DANGER_TYPE_NOT_DANGEROUS,
      download::DOWNLOAD_INTERRUPT_REASON_NETWORK_TIMEOUT, false, base::Time(),
      false, std::vector<download::DownloadItem::ReceivedSlice>());
}
#if BUILDFLAG(ENABLE_BUILTIN_SPELLCHECKER)
class DictionaryObserver final : public SpellcheckCustomDictionary::Observer {
 private:
  std::unique_ptr<gin_helper::Promise<std::set<std::string>>> promise_;
  base::WeakPtr<SpellcheckService> spellcheck_;
 public:
  DictionaryObserver(gin_helper::Promise<std::set<std::string>> promise,