Rebind mus keyboard shortcut for dump ServerWindow hierarchy to Ctrl-Alt-Shift-M

ash/common/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/common/accelerators/accelerator_table.h"
 
 #include "ash/common/strings/grit/ash_strings.h"
 #include "base/macros.h"
 
 namespace ash {
@@ skipping 255 matching lines @@
     {true, ui::VKEY_F11, ui::EF_CONTROL_DOWN,
      DEBUG_TOGGLE_ROOT_WINDOW_FULL_SCREEN},
     {true, ui::VKEY_W, ui::EF_SHIFT_DOWN | ui::EF_ALT_DOWN, CYCLE_BACKWARD_MRU},
     {true, ui::VKEY_B, ui::EF_CONTROL_DOWN | ui::EF_ALT_DOWN,
      DEBUG_TOGGLE_DESKTOP_BACKGROUND_MODE},
     {true, ui::VKEY_F, ui::EF_SHIFT_DOWN | ui::EF_CONTROL_DOWN,
      TOGGLE_FULLSCREEN},
     {true, ui::VKEY_L, kDebugModifier, DEBUG_PRINT_LAYER_HIERARCHY},
     {true, ui::VKEY_V, kDebugModifier, DEBUG_PRINT_VIEW_HIERARCHY},
     {true, ui::VKEY_W, kDebugModifier, DEBUG_PRINT_WINDOW_HIERARCHY},
+    // NOTE: VKEY_M with EF_SHIFT_DOWN | EF_CONTROL_DOWN | EF_ALT_DOWN is
+    // reserved by the mus window server to print the mus window hierarchy.
     {true, ui::VKEY_D, kDebugModifier, DEBUG_TOGGLE_DEVICE_SCALE_FACTOR},
     {true, ui::VKEY_B, kDebugModifier, DEBUG_TOGGLE_SHOW_DEBUG_BORDERS},
     {true, ui::VKEY_F, kDebugModifier, DEBUG_TOGGLE_SHOW_FPS_COUNTER},
     {true, ui::VKEY_P, kDebugModifier, DEBUG_TOGGLE_SHOW_PAINT_RECTS},
 };
 
 const size_t kDebugAcceleratorDataLength = arraysize(kDebugAcceleratorData);
 
 const AcceleratorAction kPreferredActions[] = {
     // Window cycling accelerators.
@@ skipping 234 matching lines @@
     TOGGLE_WIFI,
     VOLUME_DOWN,
     VOLUME_MUTE,
     VOLUME_UP,
 #endif  // defined(OS_CHROMEOS)
 };
 
 const size_t kActionsKeepingMenuOpenLength = arraysize(kActionsKeepingMenuOpen);
 
 }  // namespace ash