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

ash/wm/ash_focus_rules_unittest.cc

Index: ash/wm/ash_focus_rules_unittest.cc
diff --git a/ash/wm/ash_focus_rules_unittest.cc b/ash/wm/ash_focus_rules_unittest.cc
index fe06fa47353ea0c704f7bbb0f03ba72b6159c6e9..542f10f29b163950cc3b9e4e918a609d71635671 100644
--- a/ash/wm/ash_focus_rules_unittest.cc
+++ b/ash/wm/ash_focus_rules_unittest.cc
@@ -14,6 +14,7 @@
 #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"
 
@@ -186,5 +187,23 @@ TEST_F(LockScreenAshFocusRulesTest, RegainFocusAfterUnlock) {
   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