- 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
bool animate = false;
  args->GetNext(&animate);
  window_->SetPosition(gfx::Point(x, y), animate);
}
std::vector<int> Window::GetPosition() {
  std::vector<int> result(2);
  gfx::Point pos = window_->GetPosition();
  result[0] = pos.x();
  result[1] = pos.y();
  return result;
}
void Window::SetTitle(const std::string& title) {
  window_->SetTitle(title);
}
std::string Window::GetTitle() {
  return window_->GetTitle();
}
void Window::FlashFrame(bool flash) {
  window_->FlashFrame(flash);
}
void Window::SetSkipTaskbar(bool skip) {
  window_->SetSkipTaskbar(skip);
}
void Window::SetKiosk(bool kiosk) {
  window_->SetKiosk(kiosk);
}
bool Window::IsKiosk() {
  return window_->IsKiosk();
}
void Window::SetBackgroundColor(const std::string& color_name) {