A window should not get activated or get input focus if it's behind the lock screen.

ash/wm/ash_focus_rules_unittest.cc

 // Copyright 2015 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 "ash/session/session_state_delegate.h"
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
 #include "ash/test/ash_test_base.h"
 #include "ash/test/ash_test_helper.h"
 #include "ash/test/test_session_state_delegate.h"
 #include "ash/test/test_shell_delegate.h"
 #include "ash/wm/lock_state_controller.h"
 #include "ash/wm/window_state.h"
 #include "ash/wm/window_util.h"
 #include "ui/aura/client/aura_constants.h"
 #include "ui/aura/client/window_tree_client.h"
+#include "ui/views/test/widget_test.h"
 #include "ui/views/view.h"
 #include "ui/views/widget/widget.h"
 
 namespace ash {
 namespace test {
 
 namespace {
 
 // Defines a |SessionStateDelegate| that is used to create and destroy the
 // test lock screen widget.
@@ skipping 152 matching lines @@
 
   EXPECT_FALSE(shell()->session_state_delegate()->IsScreenLocked());
   EXPECT_FALSE(normal_window_state->IsMinimized());
   EXPECT_FALSE(always_on_top_window_state->IsMinimized());
   EXPECT_TRUE(normal_window_state->CanActivate());
   EXPECT_TRUE(always_on_top_window_state->CanActivate());
   EXPECT_FALSE(always_on_top_window->HasFocus());
   EXPECT_TRUE(normal_window->HasFocus());
 }
 
+// Tests that if a widget has a view which should be initially focused, this
+// view doesn't get focused if the widget shows behind the lock screen.
+TEST_F(LockScreenAshFocusRulesTest, PreventFocusChangeWithLockScreenPresent) {
+  BlockUserSession(BLOCKED_BY_LOCK_SCREEN);
+  EXPECT_TRUE(shell()->session_state_delegate()->IsScreenLocked());
+
+  views::test::TestInitialFocusWidgetDelegate delegate(CurrentContext());
+  EXPECT_FALSE(delegate.view()->HasFocus());
+  delegate.GetWidget()->Show();
+  EXPECT_FALSE(delegate.GetWidget()->IsActive());
+  EXPECT_FALSE(delegate.view()->HasFocus());
+
+  UnblockUserSession();
+  EXPECT_FALSE(shell()->session_state_delegate()->IsScreenLocked());
+  EXPECT_TRUE(delegate.GetWidget()->IsActive());
+  EXPECT_TRUE(delegate.view()->HasFocus());
+}
+
 }  // namespace test
 }  // namespace ash