Disable the old lock-screen shortcut

ash/accelerators/accelerator_controller_unittest.cc

 // Copyright (c) 2012 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/common/accelerators/accelerator_controller.h"
 
 #include "ash/aura/wm_window_aura.h"
 #include "ash/common/accelerators/accelerator_table.h"
 #include "ash/common/accessibility_delegate.h"
 #include "ash/common/accessibility_types.h"
@@ skipping 923 matching lines @@
 
 #if defined(OS_CHROMEOS)
   // Open file manager
   EXPECT_TRUE(ProcessInController(
       ui::Accelerator(ui::VKEY_M, ui::EF_SHIFT_DOWN | ui::EF_ALT_DOWN)));
 
   // Lock screen
   // NOTE: Accelerators that do not work on the lock screen need to be
   // tested before the sequence below is invoked because it causes a side
   // effect of locking the screen.
-  EXPECT_TRUE(ProcessInController(
-      ui::Accelerator(ui::VKEY_L, ui::EF_SHIFT_DOWN | ui::EF_CONTROL_DOWN)));
+  EXPECT_TRUE(
+      ProcessInController(ui::Accelerator(ui::VKEY_L, ui::EF_COMMAND_DOWN)));
 #endif
 }
 
 TEST_F(AcceleratorControllerTest, GlobalAcceleratorsToggleAppList) {
   AccessibilityDelegate* delegate = WmShell::Get()->accessibility_delegate();
   EXPECT_FALSE(WmShell::Get()->GetAppListTargetVisibility());
 
   // The press event should not open the AppList, the release should instead.
   EXPECT_FALSE(
       ProcessInController(ui::Accelerator(ui::VKEY_LWIN, ui::EF_NONE)));
@@ skipping 455 matching lines @@
     EXPECT_TRUE(IsMessageCenterEmpty());
 
     // If the action is LOCK_SCREEN, we must reset the state by unlocking the
     // screen before we proceed testing the rest of accelerators.
     ResetStateIfNeeded();
   }
 }
 #endif  // defined(OS_CHROMEOS)
 
 }  // namespace ash