- Electron version: v1.3.3
- Operating system: OS X 10.11.6

v1.3.3 broke the detection of the `scroll-touch-begin` and `scroll-touch-end` events for me within a `webview`. It looks like the pull request #6754 caused this issue. v1.3.2 works as expected.

Behavior that I'm observing on v1.3.3:
- Most of the time, the `scroll-touch-*` events are not emitted when the cursor is on top of a `webview`.
- The `scroll-touch-*` events seem to be emitted _only once_ when the cursor is on a `webview` and on a scrollable element. The scrollable elements in my app have no native scrollbar set (they have the style `overflow: hidden;` set instead of `overflow: scroll;`). This is the case in which I need to receive the `scroll-touch-*` events.
- The `scroll-touch-*` events seem to work fine when the cursor is outside of the `webview` tag.

atom/browser/api/atom_api_window.cc
window_->SetAutoHideMenuBar(auto_hide);
}
bool Window::IsMenuBarAutoHide() {
  return window_->IsMenuBarAutoHide();
}
void Window::SetMenuBarVisibility(bool visible) {
  window_->SetMenuBarVisibility(visible);
}
bool Window::IsMenuBarVisible() {
  return window_->IsMenuBarVisible();
}
#if defined(OS_WIN)
bool Window::HookWindowMessage(UINT message,
                               const MessageCallback& callback) {
  messages_callback_map_[message] = callback;
  return true;
}
void Window::UnhookWindowMessage(UINT message) {
  if (!ContainsKey(messages_callback_map_, message))
    return;
  messages_callback_map_.erase(message);
}
bool Window::IsWindowMessageHooked(UINT message) {