- Electron version: 0.37.6
- Operating system: Windows 10

In VSCode, in order to support screen readers while editing text, we set the contents of a `<textarea>` to the contents of the line and lines surrounding the cursor and we mirror the editor selection in the `<textarea>` via `setSelectionRange`.

Chromium is not the fastest when it comes to setting large amounts of text :) (such as > 10,000 characters) and basically stalls all the time. Apparently, Electron already has some knowledge about when a screen reader is attached to the main process window (in C++ code). Is it possible to expose this as a getter + event when it first happens in the `electron` API.

We could then maintain this costly `<textarea>` sync only when really needed.

atom/browser/api/atom_api_app.cc
if (Browser::Get()->is_ready()) {
    args->ThrowError("app.disableHardwareAcceleration() can only be called "
                     "before app is ready");
    return;
  }
  content::GpuDataManager::GetInstance()->DisableHardwareAcceleration();
}
#if defined(USE_NSS_CERTS)
void App::ImportCertificate(
    const base::DictionaryValue& options,
    const net::CompletionCallback& callback) {
  auto browser_context = brightray::BrowserContext::From("", false);
  if (!certificate_manager_model_) {
    std::unique_ptr<base::DictionaryValue> copy = options.CreateDeepCopy();
    CertificateManagerModel::Create(
        browser_context.get(),
        base::Bind(&App::OnCertificateManagerModelCreated,
                   base::Unretained(this),
                   base::Passed(&copy),
                   callback));
    return;
  }
  int rv = ImportIntoCertStore(certificate_manager_model_.get(), options);
  callback.Run(rv);
}
void App::OnCertificateManagerModelCreated(