* 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_win.cc
RECT rcClient;
  ::GetWindowRect(hwnd, &rcClient);
  ::SetWindowPos(hwnd, NULL, rcClient.left, rcClient.top,
                 rcClient.right - rcClient.left, rcClient.bottom - rcClient.top,
                 SWP_FRAMECHANGED);
}
}  
std::set<NativeWindowViews*> NativeWindowViews::forwarding_windows_;
HHOOK NativeWindowViews::mouse_hook_ = NULL;
void NativeWindowViews::Maximize() {
  int autohide_edges = 0;
  if (!has_frame())
    autohide_edges = GetAppbarAutohideEdges(GetAcceleratedWidget());
  
  
  
  if ((::GetWindowLong(GetAcceleratedWidget(), GWL_STYLE) & WS_THICKFRAME) &&
      (has_frame() || autohide_edges == 0)) {
    if (IsVisible())
      widget()->Maximize();
    else
      widget()->native_widget_private()->Show(ui::SHOW_STATE_MAXIMIZED,
                                              gfx::Rect());
    return;