* Output of `node_modules/.bin/electron --version`: v4.0.0
* Operating System (Platform and Version): macOS 10.14.2

* Output of `node_modules/.bin/electron --version` on last known working Electron version (if applicable): 2.0.7

### Expected behavior

I should be able to call `app.setAccessibilitySupportEnabled(true)` during initialization, and the application should start and stay open.

### Actual behavior

The application starts and exits immediately if `app.setAccessibilitySupportEnabled(true)` is called during initialization. Same for passing in `false`.

### How to reproduce

Here is a simple project that shows this error. The application behaves as expected (does not exit immediately) when this line is commented out:
https://github.com/marisademeglio/electron4-setA11yTreeEnabled/blob/master/src/main/main.js#L27

  $ git clone https://github.com/marisademeglio/electron4-setA11yTreeEnabled.git
  $ yarn install
  $ yarn start

atom/browser/api/atom_api_app.cc
#include "base/path_service.h"
#include "base/strings/string_util.h"
#include "base/sys_info.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/icon_manager.h"
#include "chrome/common/chrome_paths.h"
#include "content/browser/gpu/compositor_util.h"
#include "content/browser/gpu/gpu_data_manager_impl.h"
#include "content/public/browser/browser_accessibility_state.h"
#include "content/public/browser/browser_child_process_host.h"
#include "content/public/browser/child_process_data.h"
#include "content/public/browser/client_certificate_delegate.h"
#include "content/public/browser/gpu_data_manager.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/common/content_switches.h"
#include "media/audio/audio_manager.h"
#include "native_mate/object_template_builder.h"
#include "net/ssl/client_cert_identity.h"
#include "net/ssl/ssl_cert_request_info.h"
#include "services/network/public/cpp/network_switches.h"
#include "services/service_manager/sandbox/switches.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/gfx/image/image.h"
#include "atom/common/node_includes.h"  
#if defined(OS_WIN)
#include "atom/browser/ui/win/jump_list.h"
#include "base/strings/utf_string_conversions.h"
#endif
#if defined(OS_MACOSX)
#include <CoreFoundation/CoreFoundation.h>