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* [x] I have searched the issue tracker for an issue that matches the one I want to file, without success.

### Issue Details
App crashes when call `webContents.print()`
* **Electron Version:**
8.0.2
* **Operating System:**
Mac OS Catalina 10.15.3 (19D76)
* **Last Known Working Electron version:**
Electron 6 did not crash when print but has other bugs with printing

### Expected Behavior
<!-- A clear and concise description of what you expected to happen. -->
App should not crash
### Actual Behavior
<!-- A clear and concise description of what actually happened. -->
App crashes
### To Reproduce
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Your best chance of getting this bug looked at quickly is to provide an example.
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Can be reproduced with this Fiddle
https://gist.github.com/1aced5931b191c07adb6a111f937a4e1

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$ git clone $YOUR_URL -b $BRANCH
$ npm install
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### Screenshots
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### Additional Information
<!-- Add any other context about the problem here. -->

shell/browser/api/electron_api_web_contents.cc
if (host)
    host->CopyImageAt(x, y);
}
void Ws::Focus() {
  // Focusing on Ws does not automatically focus the window on macOS
  // and Linux, do it manually to match the behavior on Windows.
#if defined(OS_MACOSX) || defined(OS_LINUX)
  if (owner_window())
    owner_window()->Focus(true);
#endif
  ontents()->Focus();
}
#if !defined(OS_MACOSX)
bool Ws::IsFocused() const {
  auto* view = ontents()->GetRenderWidgetHostView();
  if (!view)
    return false;
  if (GetType() != Type::BACKGROUND_PAGE) {
    auto* window = ontents()->GetNativeView()->GetToplevelWindow();
    if (window && !window->IsVisible())
      return false;
  }
  return view->HasFocus();
}
#endif
void Ws::TabTraverse(bool reverse) {
  ontents()->FocusThroughTabTraversal(reverse);
}
bool Ws::SendIPCMessage(bool internal,
                                 bool send_to_all,