* 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
.SetMethod("getMinimumSize", &BrowserWindow::GetMinimumSize)
      .SetMethod("setMaximumSize", &BrowserWindow::SetMaximumSize)
      .SetMethod("getMaximumSize", &BrowserWindow::GetMaximumSize)
      .SetMethod("setSheetOffset", &BrowserWindow::SetSheetOffset)
      .SetMethod("setResizable", &BrowserWindow::SetResizable)
      .SetMethod("isResizable", &BrowserWindow::IsResizable)
      .SetMethod("setMovable", &BrowserWindow::SetMovable)
      .SetMethod("isMovable", &BrowserWindow::IsMovable)
      .SetMethod("setMinimizable", &BrowserWindow::SetMinimizable)
      .SetMethod("isMinimizable", &BrowserWindow::IsMinimizable)
      .SetMethod("setMaximizable", &BrowserWindow::SetMaximizable)
      .SetMethod("isMaximizable", &BrowserWindow::IsMaximizable)
      .SetMethod("setFullScreenable", &BrowserWindow::SetFullScreenable)
      .SetMethod("isFullScreenable", &BrowserWindow::IsFullScreenable)
      .SetMethod("setClosable", &BrowserWindow::SetClosable)
      .SetMethod("isClosable", &BrowserWindow::IsClosable)
      .SetMethod("setAlwaysOnTop", &BrowserWindow::SetAlwaysOnTop)
      .SetMethod("isAlwaysOnTop", &BrowserWindow::IsAlwaysOnTop)
      .SetMethod("center", &BrowserWindow::Center)
      .SetMethod("setPosition", &BrowserWindow::SetPosition)
      .SetMethod("getPosition", &BrowserWindow::GetPosition)
      .SetMethod("setTitle", &BrowserWindow::SetTitle)
      .SetMethod("getTitle", &BrowserWindow::GetTitle)
      .SetMethod("flashFrame", &BrowserWindow::FlashFrame)
      .SetMethod("setSkipTaskbar", &BrowserWindow::SetSkipTaskbar)
      .SetMethod("setSimpleFullScreen", &BrowserWindow::SetSimpleFullScreen)
      .SetMethod("isSimpleFullScreen", &BrowserWindow::IsSimpleFullScreen)
      .SetMethod("setKiosk", &BrowserWindow::SetKiosk)
      .SetMethod("isKiosk", &BrowserWindow::IsKiosk)
      .SetMethod("setBackgroundColor", &BrowserWindow::SetBackgroundColor)