* Electron Version: 2.0.0
* Operating System (Platform and Version): Windows 10
* Last known working Electron version: before commit bb5eecc16cff8053c7b04e0b9396803fbbb8c4df

**Expected Behavior**
Width and height of a window should not change while being dragged 

**Actual behavior**
Width and height become smaller.

**To Reproduce**
Create a window with:
  var mainWindow = new BrowserWindow({width: 1024, height: 880, x: 30, y: 30,
            resizable: false })

Then drag the window.  Width and height become smaller than specified (1024, 880)

**Additional Information**
NativeWindowViews::SetBounds calls SetMin/MaxSize(bounds) when resizable_ is false.  bounds get adjusted to smaller  numbers by WindowBoundsToContentBounds.

shell/browser/native_window_views.cc
if (!content_view())
    return;
  if (!view) {
    return;
  }
  add_browser_view(view);
  content_view()->AddChildView(
      view->GetInspectableWebContentsView()->GetView());
}
void NativeWindowViews::RemoveBrowserView(NativeBrowserView* view) {
  if (!content_view())
    return;
  if (!view) {
    return;
  }
  content_view()->RemoveChildView(
      view->GetInspectableWebContentsView()->GetView());
  remove_browser_view(view);
}
void NativeWindowViews::SetParentWindow(NativeWindow* parent) {