Add high contrast keyboard shortcut to keyboard overlay

chrome/browser/ui/webui/chromeos/keyboard_overlay_ui.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 "chrome/browser/ui/webui/chromeos/keyboard_overlay_ui.h"
 
 #include <stddef.h>
 
 #include "ash/shell.h"
 #include "base/bind.h"
@@ skipping 242 matching lines @@
   { "keyboardOverlaySwapPrimaryMonitor",
     IDS_KEYBOARD_OVERLAY_SWAP_PRIMARY_MONITOR },
   { "keyboardOverlayTakeScreenshot", IDS_KEYBOARD_OVERLAY_TAKE_SCREENSHOT },
   { "keyboardOverlayTaskManager", IDS_KEYBOARD_OVERLAY_TASK_MANAGER },
   { "keyboardOverlayToggleBookmarkBar",
     IDS_KEYBOARD_OVERLAY_TOGGLE_BOOKMARK_BAR },
   { "keyboardOverlayToggleCapsLock", IDS_KEYBOARD_OVERLAY_TOGGLE_CAPS_LOCK },
   { "keyboardOverlayDisableCapsLock", IDS_KEYBOARD_OVERLAY_DISABLE_CAPS_LOCK },
   { "keyboardOverlayToggleChromevoxSpokenFeedback",
     IDS_KEYBOARD_OVERLAY_TOGGLE_CHROMEVOX_SPOKEN_FEEDBACK },
+  { "keyboardOverlayToggleHighContrastMode",
+    IDS_KEYBOARD_OVERLAY_TOGGLE_HIGH_CONTRAST_MODE },
   { "keyboardOverlayToggleProjectionTouchHud",
     IDS_KEYBOARD_OVERLAY_TOGGLE_PROJECTION_TOUCH_HUD },
   { "keyboardOverlayUndo", IDS_KEYBOARD_OVERLAY_UNDO },
   { "keyboardOverlayViewKeyboardOverlay",
     IDS_KEYBOARD_OVERLAY_VIEW_KEYBOARD_OVERLAY },
   { "keyboardOverlayViewSource", IDS_KEYBOARD_OVERLAY_VIEW_SOURCE },
   { "keyboardOverlayWordMove", IDS_KEYBOARD_OVERLAY_WORD_MOVE },
   { "keyboardOverlayZoomIn", IDS_KEYBOARD_OVERLAY_ZOOM_IN },
   { "keyboardOverlayZoomOut", IDS_KEYBOARD_OVERLAY_ZOOM_OUT },
   { "keyboardOverlayZoomScreenIn", IDS_KEYBOARD_OVERLAY_ZOOM_SCREEN_IN },
@@ skipping 148 matching lines @@
 
 KeyboardOverlayUI::KeyboardOverlayUI(content::WebUI* web_ui)
     : WebDialogUI(web_ui) {
   Profile* profile = Profile::FromWebUI(web_ui);
   web_ui->AddMessageHandler(base::MakeUnique<KeyboardOverlayHandler>(profile));
 
   // Set up the chrome://keyboardoverlay/ source.
   content::WebUIDataSource::Add(profile,
                                 CreateKeyboardOverlayUIHTMLSource(profile));
 }