Add power-user keyboard mode for ChromeOS with Search key acting as a typical Fn key.

ash/accelerators/accelerator_table.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/accelerators/accelerator_table.h"
 
 #include "base/basictypes.h"
 
 namespace ash {
 
@@ skipping 90 matching lines @@
   { true, ui::VKEY_N, ui::EF_CONTROL_DOWN, NEW_WINDOW },
   { true, ui::VKEY_T, ui::EF_CONTROL_DOWN, NEW_TAB },
 
   { true, ui::VKEY_F3,
     ui::EF_SHIFT_DOWN | ui::EF_CONTROL_DOWN | ui::EF_ALT_DOWN,
     ROTATE_WINDOWS },
   { true, ui::VKEY_MEDIA_LAUNCH_APP1, ui::EF_SHIFT_DOWN,
     CYCLE_BACKWARD_LINEAR },
   { true, ui::VKEY_T, ui::EF_SHIFT_DOWN | ui::EF_CONTROL_DOWN, RESTORE_TAB },
   { true, ui::VKEY_PRINT, ui::EF_NONE, TAKE_SCREENSHOT },
-  // On Chrome OS, Search key is mapped to LWIN.
+  // On Chrome OS, Search key is mapped to LWIN. The Search key binding should
+  // act on release instead of press when using Search as a modifier key for
+  // extended keyboard shortcuts.
   { true, ui::VKEY_LWIN, ui::EF_NONE, TOGGLE_APP_LIST },
+  { false, ui::VKEY_LWIN, ui::EF_NONE, TOGGLE_APP_LIST },
   { true, ui::VKEY_MEDIA_LAUNCH_APP2, ui::EF_NONE, TOGGLE_APP_LIST },
   { true, ui::VKEY_LWIN, ui::EF_ALT_DOWN, TOGGLE_CAPS_LOCK },
   { true, ui::VKEY_VOLUME_MUTE, ui::EF_NONE, VOLUME_MUTE },
   { true, ui::VKEY_VOLUME_DOWN, ui::EF_NONE, VOLUME_DOWN },
   { true, ui::VKEY_VOLUME_UP, ui::EF_NONE, VOLUME_UP },
   { true, ui::VKEY_L, ui::EF_SHIFT_DOWN | ui::EF_ALT_DOWN, FOCUS_LAUNCHER },
   { true, ui::VKEY_S, ui::EF_SHIFT_DOWN | ui::EF_ALT_DOWN, FOCUS_SYSTEM_TRAY },
   { true, ui::VKEY_HELP, ui::EF_NONE, SHOW_KEYBOARD_OVERLAY },
   { true, ui::VKEY_OEM_2, ui::EF_CONTROL_DOWN | ui::EF_ALT_DOWN,
     SHOW_KEYBOARD_OVERLAY },
@@ skipping 158 matching lines @@
   CYCLE_BACKWARD_MRU,
   CYCLE_FORWARD_LINEAR,
   CYCLE_FORWARD_MRU,
   TOGGLE_MAXIMIZED,
 };
 
 const size_t kNonrepeatableActionsLength =
     arraysize(kNonrepeatableActions);
 
 }  // namespace ash