Test coverage for bug in WmWindowAura::OnWindowVisibilityChanged()

ash/common/test/ash_test.cc

Index: ash/common/test/ash_test.cc
diff --git a/ash/common/test/ash_test.cc b/ash/common/test/ash_test.cc
index 7f5630096e5eb0b7b09226c89ec7c052f1d48274..88030968a8bf716a2ebddbacd6d7c10ef3306ee9 100644
--- a/ash/common/test/ash_test.cc
+++ b/ash/common/test/ash_test.cc
@@ -5,7 +5,9 @@
 #include "ash/common/test/ash_test.h"
 
 #include "ash/common/test/ash_test_impl.h"
+#include "ash/common/wm_shell.h"
 #include "ash/common/wm_window.h"
+#include "ui/compositor/layer_type.h"
 #include "ui/display/display.h"
 
 namespace ash {
@@ -34,6 +36,19 @@ std::unique_ptr<WindowOwner> AshTest::CreateTestWindow(const gfx::Rect& bounds,
   return test_impl_->CreateTestWindow(bounds, type, shell_window_id);
 }
 
+std::unique_ptr<WindowOwner> AshTest::CreateChildWindow(WmWindow* parent,
+                                                        const gfx::Rect& bounds,
+                                                        int shell_window_id) {
+  std::unique_ptr<WindowOwner> window_owner =
+      base::MakeUnique<WindowOwner>(WmShell::Get()->NewWindow(
+          ui::wm::WINDOW_TYPE_NORMAL, ui::LAYER_NOT_DRAWN));
+  window_owner->window()->SetBounds(bounds);
+  window_owner->window()->SetShellWindowId(shell_window_id);
+  parent->AddChild(window_owner->window());
+  window_owner->window()->Show();
+  return window_owner;
+}
+
 display::Display AshTest::GetSecondaryDisplay() {
   return test_impl_->GetSecondaryDisplay();
 }