* 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_view.cc
WebContents::Create(isolate, web_preferences);
  web_contents_.Reset(isolate, web_contents.ToV8());
  api_web_contents_ = web_contents.get();
  view_.reset(NativeBrowserView::Create(
      api_web_contents_->managed_web_contents()->GetView()));
  InitWith(isolate, wrapper);
}
BrowserView::~BrowserView() {
  api_web_contents_->DestroyWebContents(true );
}
mate::WrappableBase* BrowserView::New(mate::Arguments* args) {
  if (!Browser::Get()->is_ready()) {
    args->ThrowError("Cannot create BrowserView before app is ready");
    return nullptr;
  }
  if (args->Length() > 1) {
    args->ThrowError("Too many arguments");
    return nullptr;
  }
  mate::Dictionary options;
  if (!(args->Length() == 1 && args->GetNext(&options))) {
    options = mate::Dictionary::CreateEmpty(args->isolate());
  }
  return new BrowserView(args->isolate(), args->GetThis(), options);
}
int32_t BrowserView::ID() const {
  return weak_map_id();
}
void BrowserView::SetAutoResize(AutoResizeFlags flags) {