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

ui/aura/window_unittest.cc

Index: ui/aura/window_unittest.cc
diff --git a/ui/aura/window_unittest.cc b/ui/aura/window_unittest.cc
index 48834c5fef13614203b39bdb1f00531a31b008a3..668e7856be64295fb69a7e800dbe50ba947a1840 100644
--- a/ui/aura/window_unittest.cc
+++ b/ui/aura/window_unittest.cc
@@ -594,5 +594,42 @@ TEST_F(WindowTest, GetEventHandlerForPoint_NoDelegate) {
   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