Enable to show the keyboard overlay by shortcut key.

chrome/browser/ui/views/accelerator_table_gtk.cc

 // Copyright (c) 2010 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 "chrome/browser/views/accelerator_table_gtk.h"
 
 #include "app/keyboard_codes.h"
 #include "base/basictypes.h"
 #include "chrome/app/chrome_command_ids.h"
 
 namespace browser {
 
 // NOTE: Keep this list in the same (mostly-alphabetical) order as
 // the Windows accelerators in ../../app/chrome_dll.rc.
 const AcceleratorMapping kAcceleratorMap[] = {
   // Keycode                  Shift  Ctrl   Alt    Command ID
   { app::VKEY_A,              true,  true,  false, IDC_AUTOFILL_DEFAULT },
   { app::VKEY_LEFT,           false, false, true,  IDC_BACK },
   { app::VKEY_BACK,           false, false, false, IDC_BACK },
 #if defined(OS_CHROMEOS)
   { app::VKEY_F1,             false, false, false, IDC_BACK },
+  // TODO(mazda): Change VKEY_1 to VKEY_OME_2 once the new version of the
+  // keyboard overlay is ready.
+  { app::VKEY_1,              false, true,  true,  IDC_SHOW_KEYBOARD_OVERLAY },
 #endif
   { app::VKEY_D,              false, true,  false, IDC_BOOKMARK_PAGE },
   { app::VKEY_D,              true,  true,  false, IDC_BOOKMARK_ALL_TABS },
   { app::VKEY_DELETE,         true,  true,  false, IDC_CLEAR_BROWSING_DATA },
 #if !defined(OS_CHROMEOS)
   { app::VKEY_F4,             false, true,  false, IDC_CLOSE_TAB },
 #endif
   { app::VKEY_W,              false, true,  false, IDC_CLOSE_TAB },
   { app::VKEY_W,              true,  true,  false, IDC_CLOSE_WINDOW },
 #if !defined(OS_CHROMEOS)
@@ skipping 118 matching lines @@
   { app::VKEY_0,              false, true,  false, IDC_ZOOM_NORMAL },
   { app::VKEY_NUMPAD0,        false, true,  false, IDC_ZOOM_NORMAL },
   { app::VKEY_OEM_PLUS,       false, true,  false, IDC_ZOOM_PLUS },
   { app::VKEY_OEM_PLUS,       true,  true,  false, IDC_ZOOM_PLUS },
   { app::VKEY_ADD,            false, true,  false, IDC_ZOOM_PLUS },
 };
 
 const size_t kAcceleratorMapLength = arraysize(kAcceleratorMap);
 
 }  // namespace browser