Temporarily disable Alpha shaped windows

Due to bugs with scaling and handling NULL regions.

BUG=376532

Review URL: https://codereview.chromium.org/296513022

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@272779 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/ui/views/apps/chrome_native_app_window_views.cc

@@ -667,8 +667,6 @@ void ChromeNativeAppWindowViews::UpdateShape(scoped_ptr<SkRegion> region) {
   aura::Window* native_window = widget()->GetNativeWindow();
   if (shape_) {
     widget()->SetShape(new SkRegion(*shape_));
-    native_window->layer()->SetAlphaShape(
-        make_scoped_ptr(new SkRegion(*shape_)));
     if (!had_shape) {
       native_window->SetEventTargeter(scoped_ptr<ui::EventTargeter>(
           new ShapedAppWindowTargeter(native_window, this)));