[MacViews] Implement AlwaysOnTop and VisibleOnAllWorkspaces.

ui/views/widget/widget_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <algorithm>
 #include <set>
 
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 3415 matching lines @@
           ui::WindowEventTarget::kWin32InputEventTarget));
   EXPECT_NE(nullptr, target);
   bool handled = false;
   target->HandleKeyboardMessage(WM_CHAR, 0, 0, &handled);
   target->HandleKeyboardMessage(WM_SYSCHAR, 0, 0, &handled);
   target->HandleKeyboardMessage(WM_SYSDEADCHAR, 0, 0, &handled);
   widget.CloseNow();
 }
 #endif
 
+// Test that SetAlwaysOnTop and IsAlwaysOnTop are consistent.
+TEST_F(WidgetTest, AlwaysOnTop) {
+  Widget* widget = CreateTopLevelNativeWidget();
+  EXPECT_FALSE(widget->IsAlwaysOnTop());
+  widget->SetAlwaysOnTop(true);
+  EXPECT_TRUE(widget->IsAlwaysOnTop());
+  widget->SetAlwaysOnTop(false);
+  EXPECT_FALSE(widget->IsAlwaysOnTop());
+}
+
 }  // namespace test
 }  // namespace views