* 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
window_->Center();
}
void BrowserWindow::SetPosition(int x, int y, mate::Arguments* args) {
  bool animate = false;
  args->GetNext(&animate);
  window_->SetPosition(gfx::Point(x, y), animate);
}
std::vector<int> BrowserWindow::GetPosition() {
  std::vector<int> result(2);
  gfx::Point pos = window_->GetPosition();
  result[0] = pos.x();
  result[1] = pos.y();
  return result;
}
void BrowserWindow::SetTitle(const std::string& title) {
  window_->SetTitle(title);
}
std::string BrowserWindow::GetTitle() {
  return window_->GetTitle();
}
void BrowserWindow::FlashFrame(bool flash) {
  window_->FlashFrame(flash);
}
void BrowserWindow::SetSkipTaskbar(bool skip) {
  window_->SetSkipTaskbar(skip);
}
void BrowserWindow::SetSimpleFullScreen(bool simple_fullscreen) {
  window_->SetSimpleFullScreen(simple_fullscreen);
}
bool BrowserWindow::IsSimpleFullScreen() {