* 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
Emit("minimize");
}
void BrowserWindow::OnWindowRestore() {
  Emit("restore");
}
void BrowserWindow::OnWindowResize() {
#if defined(OS_MACOSX)
  if (!draggable_regions_.empty())
    UpdateDraggableRegions(nullptr, draggable_regions_);
#endif
  Emit("resize");
}
void BrowserWindow::OnWindowMove() {
  Emit("move");
}
void BrowserWindow::OnWindowMoved() {
  Emit("moved");
}
void BrowserWindow::OnWindowEnterFullScreen() {
  Emit("enter-full-screen");
}
void BrowserWindow::OnWindowLeaveFullScreen() {
  Emit("leave-full-screen");
}
void BrowserWindow::OnWindowScrollTouchBegin() {
  Emit("scroll-touch-begin");
}
void BrowserWindow::OnWindowScrollTouchEnd() {