* 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
v8::Local<v8::Object> wrapper,
                         const mate::Dictionary& options)
    : api_web_contents_(nullptr) {
  Init(isolate, wrapper, options);
}
void BrowserView::Init(v8::Isolate* isolate,
                       v8::Local<v8::Object> wrapper,
                       const mate::Dictionary& options) {
  mate::Dictionary web_preferences = mate::Dictionary::CreateEmpty(isolate);
  options.Get(options::kWebPreferences, &web_preferences);
  web_preferences.Set("isBrowserView", true);
  mate::Handle<class WebContents> web_contents =