Add app.window.alphaEnabled() and onAlphaEnabledChanged.

ui/views/widget/widget.cc

Index: ui/views/widget/widget.cc
diff --git a/ui/views/widget/widget.cc b/ui/views/widget/widget.cc
index fdcb32af915e97a73fead05becf0ac0c83dece35..9cf9a950d707ccb361f6ec462f41349c5497357f 100644
--- a/ui/views/widget/widget.cc
+++ b/ui/views/widget/widget.cc
@@ -984,6 +984,9 @@ void Widget::OnRootViewLayout() {
 void Widget::OnOwnerClosing() {
 }
 
+bool Widget::CanHaveAlphaEnabled() const {

[tapted, 2014/07/16 03:01:01]

nit: move up

[jackhou1, 2014/07/16 05:54:04]

Done.

+  return native_widget_->CanHaveAlphaEnabled();
+}
 ////////////////////////////////////////////////////////////////////////////////
 // Widget, NativeWidgetDelegate implementation: