* Electron version: 1.8.2
* Operating system: macos 10.13.3

Reproducing repo: https://github.com/ibash/electron-webkit-app-drag

Demonstrates a bug where `-webkit-app-region: drag` causes a browser view in front of it to miss click events. Oddly - it does not prevent hover events.

Steps:
1. Clone https://github.com/ibash/electron-webkit-app-drag, `yarn install`, `yarn start`
2. Click "button1"
3. Click "button2"

Expected:

Clicking button1 or button2 pops up an alert: "button clicked!"

Actual:

Only clicking button2 pops up an alert: "button clicked!"

atom/browser/api/atom_api_browser_window.cc
return window_->IsSimpleFullScreen();
}
void BrowserWindow::SetKiosk(bool kiosk) {
  window_->SetKiosk(kiosk);
}
bool BrowserWindow::IsKiosk() {
  return window_->IsKiosk();
}
void BrowserWindow::SetBackgroundColor(const std::string& color_name) {
  SkColor color = ParseHexColor(color_name);
  window_->SetBackgroundColor(color);
  auto* view = web_contents()->GetRenderWidgetHostView();
  if (view)
    view->SetBackgroundColor(color);
}
void BrowserWindow::SetHasShadow(bool has_shadow) {
  window_->SetHasShadow(has_shadow);
}
bool BrowserWindow::HasShadow() {
  return window_->HasShadow();
}
void BrowserWindow::SetOpacity(const double opacity) {
  window_->SetOpacity(opacity);
}
double BrowserWindow::GetOpacity() {
  return window_->GetOpacity();
}
void BrowserWindow::FocusOnWebView() {