* 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/native_browser_view_mac.h
#ifndef ATOM_BROWSER_NATIVE_BROWSER_VIEW_MAC_H_
#define ATOM_BROWSER_NATIVE_BROWSER_VIEW_MAC_H_
#import <Cocoa/Cocoa.h>
#include <vector>
#include "atom/browser/native_browser_view.h"
#include "atom/common/draggable_region.h"
#include "base/mac/scoped_nsobject.h"
namespace atom {
class NativeBrowserViewMac : public NativeBrowserView {
 public:
  explicit NativeBrowserViewMac(
      brightray::InspectableWebContentsView* web_contents_view);
  ~NativeBrowserViewMac() override;
  void SetAutoResizeFlags(uint8_t flags) override;
  void SetBounds(const gfx::Rect& bounds) override;
  void SetBackgroundColor(SkColor color) override;
  void UpdateDraggableRegions(
      const std::vector<gfx::Rect>& system_drag_exclude_areas) override;
 private:
  DISALLOW_COPY_AND_ASSIGN(NativeBrowserViewMac);
};
}  
#endif