- 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/native_window.cc
return GetBounds().origin();
}
void NativeWindow::SetContentSize(const gfx::Size& size, bool animate) {
  SetSize(ContentBoundsToWindowBounds(gfx::Rect(size)).size(), animate);
}
gfx::Size NativeWindow::GetContentSize() {
  return GetContentBounds().size();
}
void NativeWindow::SetContentBounds(const gfx::Rect& bounds, bool animate) {
  SetBounds(ContentBoundsToWindowBounds(bounds), animate);
}
gfx::Rect NativeWindow::GetContentBounds() {
  return WindowBoundsToContentBounds(GetBounds());
}
void NativeWindow::SetSizeConstraints(
    const extensions::SizeConstraints& window_constraints) {
  extensions::SizeConstraints content_constraints(GetContentSizeConstraints());
  if (window_constraints.HasMaximumSize()) {
    gfx::Rect max_bounds = WindowBoundsToContentBounds(
        gfx::Rect(window_constraints.GetMaximumSize()));
    content_constraints.set_maximum_size(max_bounds.size());
  }
  if (window_constraints.HasMinimumSize()) {
    gfx::Rect min_bounds = WindowBoundsToContentBounds(
        gfx::Rect(window_constraints.GetMinimumSize()));
    content_constraints.set_minimum_size(min_bounds.size());
  }
  SetContentSizeConstraints(content_constraints);
}
extensions::SizeConstraints NativeWindow::GetSizeConstraints() {