* Output of `node_modules/.bin/electron --version`: v3.0.10
* Operating System (Platform and Version): Windows 10 x64 (1803  17134.345)
* Output of `node_modules/.bin/electron --version` on last known working Electron version (if applicable):
v3.0.10
**Expected Behavior**
I would like to see the window move across the screen.

**Actual behavior**
The window moves around the screen. But first, the height of the window decreases.

**To Reproduce**
Write simple program that contains code:
`
mainWindow = new BrowserWindow({ width: 370,
		height: 270,
		x: 100,
		y: 100,
		resizable: false,
	 });
`
Start app. Grab the window with the mouse for its title and drag across the screen.

**Additional Information**
This error occurs when explicitly specifying the x, y coordinates of the window and the option "resizable: false".

atom/browser/native_window.cc
extensions::SizeConstraints content_constraints = GetContentSizeConstraints();
  extensions::SizeConstraints window_constraints;
  if (content_constraints.HasMaximumSize()) {
    gfx::Rect max_bounds = ContentBoundsToWindowBounds(
        gfx::Rect(content_constraints.GetMaximumSize()));
    window_constraints.set_maximum_size(max_bounds.size());
  }
  if (content_constraints.HasMinimumSize()) {
    gfx::Rect min_bounds = ContentBoundsToWindowBounds(
        gfx::Rect(content_constraints.GetMinimumSize()));
    window_constraints.set_minimum_size(min_bounds.size());
  }
  return window_constraints;
}
void NativeWindow::SetContentSizeConstraints(
    const extensions::SizeConstraints& size_constraints) {
  size_constraints_ = size_constraints;
}
extensions::SizeConstraints NativeWindow::GetContentSizeConstraints() const {
  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() const {