* 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
#include "atom/browser/api/atom_api_browser_view.h"
#include "atom/browser/api/atom_api_web_contents.h"
#include "atom/browser/browser.h"
#include "atom/browser/native_browser_view.h"
#include "atom/common/color_util.h"
#include "atom/common/native_mate_converters/gfx_converter.h"
#include "atom/common/native_mate_converters/value_converter.h"
#include "atom/common/node_includes.h"
#include "atom/common/options_switches.h"
#include "native_mate/constructor.h"
#include "native_mate/dictionary.h"
#include "ui/gfx/geometry/rect.h"
namespace mate {
template <>
struct Converter<atom::AutoResizeFlags> {
  static bool FromV8(v8::Isolate* isolate,