- 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.h
#ifndef ATOM_BROWSER_API_ATOM_API_WINDOW_H_
#define ATOM_BROWSER_API_ATOM_API_WINDOW_H_
#include <map>
#include <memory>
#include <string>
#include <vector>
#include "atom/browser/api/trackable_object.h"
#include "atom/browser/native_window.h"
#include "atom/browser/native_window_observer.h"
#include "atom/common/api/atom_api_native_image.h"
#include "atom/common/key_weak_map.h"
#include "native_mate/handle.h"
#include "ui/gfx/image/image.h"
class GURL;
namespace gfx {
class Rect;
}
namespace mate {
class Arguments;
class Dictionary;
}
namespace atom {
class NativeWindow;
namespace api {
class WebContents;