* Electron Version: 3.0.0.beta.3
* Operating System (Platform and Version): Mac OS X 10.13.6
* Last known working Electron version: 2.0.5

**Expected Behavior**
Window title (`document.title`) shows as window title using third party window switcher like [Contexts](https://contexts.co/)

**Actual behavior**
It shows app name (`Electron`) instead of window title

**To Reproduce**
1. Install contexts app or other window switcher that shows window titles
2. Clone and run untouched [electron-quick-start](https://github.com/electron/electron-quick-start) with `npm start`
3. Run app switcher and you see app with `Hello World!` title (see screenshot)
4. Install electron beta 3 `npm install --save-dev electron@3.0.0-beta.3` and run app again `npm start`
5. Run app switcher and you see app with `Electron` title (see screenshot)

**Screenshots**
Electron v2:
<img width="678" alt="ss1" src="https://user-images.githubusercontent.com/8137000/42895558-94145726-8aba-11e8-8c23-c9dcce152e06.png">

Electron Beta:
<img width="683" alt="ss2" src="https://user-images.githubusercontent.com/8137000/42895724-05a06fce-8abb-11e8-8f8a-7f42c774ef17.png">

**Additional Information**
I know is it some sort of corner case but it is still a regression plus this can indicate non-native windowing

atom/browser/ui/cocoa/atom_ns_window.h
class ScopedDisableResize {
 public:
  ScopedDisableResize() { disable_resize_ = true; }
  ~ScopedDisableResize() { disable_resize_ = false; }
  static bool IsResizeDisabled() { return disable_resize_; }
 private:
  static bool disable_resize_;
};
}  
@interface AtomNSWindow : NativeWidgetMacNSWindow {
 @private
  atom::NativeWindowMac* shell_;
  CGFloat windowButtonsInterButtonSpacing_;
}
@property BOOL acceptsFirstMouse;
@property BOOL enableLargerThanScreen;
@property BOOL disableAutoHideCursor;
@property BOOL disableKeyOrMainWindow;
@property NSPoint windowButtonsOffset;
@property(nonatomic, retain) NSView* vibrantView;
- (id)initWithShell:(atom::NativeWindowMac*)shell
          styleMask:(NSUInteger)styleMask;
- (atom::NativeWindowMac*)shell;
- (NSRect)originalContentRectForFrameRect:(NSRect)frameRect;
- (void)enableWindowButtonsOffset;
- (void)toggleFullScreenMode:(id)sender;
@end
#endif