- 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.h
#ifndef ATOM_BROWSER_NATIVE_WINDOW_H_
#define ATOM_BROWSER_NATIVE_WINDOW_H_
#include <map>
#include <memory>
#include <string>
#include <vector>
#include "atom/browser/native_window_observer.h"
#include "atom/browser/ui/accelerator_util.h"
#include "atom/browser/ui/atom_menu_model.h"
#include "base/cancelable_callback.h"
#include "base/memory/weak_ptr.h"
#include "base/observer_list.h"
#include "base/supports_user_data.h"
#include "content/public/browser/readback_types.h"
#include "content/public/browser/web_contents_observer.h"
#include "content/public/browser/web_contents_user_data.h"
#include "extensions/browser/app_window/size_constraints.h"
#include "ui/gfx/image/image.h"
#include "ui/gfx/image/image_skia.h"
class SkRegion;