- 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
SetResizable(resizable);
  }
#endif
#if defined(OS_WIN) || defined(USE_X11)
  bool closable;
  if (options.Get(options::kClosable, &closable)) {
    SetClosable(closable);
  }
#endif
  bool movable;
  if (options.Get(options::kMovable, &movable)) {
    SetMovable(movable);
  }
  bool has_shadow;
  if (options.Get(options::kHasShadow, &has_shadow)) {
    SetHasShadow(has_shadow);
  }
  bool top;
  if (options.Get(options::kAlwaysOnTop, &top) && top) {
    SetAlwaysOnTop(true);
  }
  bool fullscreenable = true;
  bool fullscreen = false;
  if (options.Get(options::kFullscreen, &fullscreen) && !fullscreen) {
    
  #if defined(OS_MACOSX)
    fullscreenable = false;
  #endif
  }