Makes visbility inherited. That is, in order for a window to be

ui/aura/window_unittest.cc

 // Copyright (c) 2011 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 "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/message_loop.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/aura/desktop.h"
 #include "ui/aura/event.h"
@@ skipping 576 matching lines @@
       gfx::Rect(0, 0, 500, 500), w1.get()));
   scoped_ptr<Window> w111(CreateTestWindowWithDelegate(&d111, 1,
       gfx::Rect(50, 50, 450, 450), w11.get()));
   scoped_ptr<Window> w12(CreateTestWindowWithDelegate(NULL, 12,
       gfx::Rect(0, 0, 500, 500), w1.get()));
 
   gfx::Point target_point = w111->bounds().CenterPoint();
   EXPECT_EQ(w111.get(), w1->GetEventHandlerForPoint(target_point));
 }
 
+// Verifies show/hide propagate correctly to children and the layer.
+TEST_F(WindowTest, Visibility) {
+  scoped_ptr<Window> w1(CreateTestWindowWithId(1, NULL));
+  scoped_ptr<Window> w2(CreateTestWindowWithId(2, w1.get()));
+  scoped_ptr<Window> w3(CreateTestWindowWithId(3, w2.get()));
+
+  // Create shows all the windows.
+  EXPECT_TRUE(w1->IsVisible());
+  EXPECT_TRUE(w2->IsVisible());
+  EXPECT_TRUE(w3->IsVisible());
+
+  w1->Hide();
+  EXPECT_FALSE(w1->IsVisible());
+  EXPECT_FALSE(w2->IsVisible());
+  EXPECT_FALSE(w3->IsVisible());
+
+  w2->Show();
+  EXPECT_FALSE(w1->IsVisible());
+  EXPECT_FALSE(w2->IsVisible());
+  EXPECT_FALSE(w3->IsVisible());
+
+  w3->Hide();
+  EXPECT_FALSE(w1->IsVisible());
+  EXPECT_FALSE(w2->IsVisible());
+  EXPECT_FALSE(w3->IsVisible());
+
+  w1->Show();
+  EXPECT_TRUE(w1->IsVisible());
+  EXPECT_TRUE(w2->IsVisible());
+  EXPECT_FALSE(w3->IsVisible());
+
+  w3->Show();
+  EXPECT_TRUE(w1->IsVisible());
+  EXPECT_TRUE(w2->IsVisible());
+  EXPECT_TRUE(w3->IsVisible());
+}
+
 }  // namespace internal
 }  // namespace aura