- Electron version: 1.1.3
- Operating system: Windows 10 Pro x64

Documentation in https://github.com/electron/electron/blob/master/docs/api/browser-window.md on `fullscreenable` seems to be not exactly true.

`fullscreenable` default value on windows seems to be the same as `fullscreen` option, not just false

For example:
main.js

``` JavaScript
  mainWindow = new BrowserWindow({
    width: 800, height: 600,
    minWidth: 800, minHeight: 600,
    center: true,
    fullscreen: false,
    autoHideMenuBar: true,
    frame: false,
    resizable: false
  });
```

somewhere in client code:

``` JavaScript
        //...
        let currentWindow = electron.remote.getCurrentWindow();
        currentWindow.setFullScreen(true); //Does not switch to the fullscreen
        //currentWindow.setFullScreen(false) and back to true  works when initial fullscreen:true
        //...
```

**However** the code below seems to work as expected,
main.js

``` JavaScript
  mainWindow = new BrowserWindow({
    width: 800, height: 600,
    minWidth: 800, minHeight: 600,
    center: true,
    fullscreen: false,
    fullscreenable: true, //ADDED
    autoHideMenuBar: true,
    frame: false,
    resizable: false
  });
```

somewhere in client code:

``` JavaScript
        //...
        let currentWindow = electron.remote.getCurrentWindow();
        currentWindow.setFullScreen(true); //does switch to the fullscreen
        //...
```

atom/browser/native_window.cc
const extensions::SizeConstraints& size_constraints) {
  size_constraints_ = size_constraints;
}
extensions::SizeConstraints NativeWindow::GetContentSizeConstraints() {
  return size_constraints_;
}
void NativeWindow::SetMinimumSize(const gfx::Size& size) {
  extensions::SizeConstraints size_constraints;
  size_constraints.set_minimum_size(size);
  SetSizeConstraints(size_constraints);
}
gfx::Size NativeWindow::GetMinimumSize() {
  return GetSizeConstraints().GetMinimumSize();
}
void NativeWindow::SetMaximumSize(const gfx::Size& size) {
  extensions::SizeConstraints size_constraints;
  size_constraints.set_maximum_size(size);
  SetSizeConstraints(size_constraints);
}
gfx::Size NativeWindow::GetMaximumSize() {
  return GetSizeConstraints().GetMaximumSize();
}
void NativeWindow::SetSheetOffset(const double offsetX, const double offsetY) {
  sheet_offset_x_ = offsetX;
  sheet_offset_y_ = offsetY;
}
double NativeWindow::GetSheetOffsetX() {
  return sheet_offset_x_;
}
double NativeWindow::GetSheetOffsetY() {