MD Settings: Add remaining buttons to keyboard subpage

chrome/browser/ui/webui/settings/chromeos/device_keyboard_handler.cc

 // Copyright 2016 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/settings/chromeos/device_keyboard_handler.h"
 
+#include "ash/new_window_delegate.h"
+#include "ash/shell.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/values.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chromeos/chromeos_switches.h"
 #include "content/public/browser/web_ui.h"
 #include "ui/events/devices/device_data_manager.h"
 #include "ui/events/devices/keyboard_device.h"
 
 namespace {
@@ skipping 20 matching lines @@
 
 KeyboardHandler::~KeyboardHandler() {
   ui::DeviceDataManager::GetInstance()->RemoveObserver(this);
 }
 
 void KeyboardHandler::RegisterMessages() {
   web_ui()->RegisterMessageCallback(
       "initializeKeyboardSettings",
       base::Bind(&KeyboardHandler::HandleInitialize,
                  base::Unretained(this)));
+  web_ui()->RegisterMessageCallback(
+      "showKeyboardShortcutsOverlay",
+      base::Bind(&KeyboardHandler::HandleShowKeyboardShortcutsOverlay,
+                 base::Unretained(this)));
 }
 
 void KeyboardHandler::OnKeyboardDeviceConfigurationChanged() {
   UpdateShowKeys();
 }
 
 void KeyboardHandler::HandleInitialize(const base::ListValue* args) {
   UpdateShowKeys();
 }
 
+void KeyboardHandler::HandleShowKeyboardShortcutsOverlay(
+    const base::ListValue* args) const {
+  ash::Shell::GetInstance()->new_window_delegate()->ShowKeyboardOverlay();
+}
+
 void KeyboardHandler::UpdateShowKeys() const {
   const base::FundamentalValue has_caps_lock(HasExternalKeyboard());
   const base::FundamentalValue has_diamond_key(
       base::CommandLine::ForCurrentProcess()->HasSwitch(
           chromeos::switches::kHasChromeOSDiamondKey));
   web_ui()->CallJavascriptFunction("cr.webUIListenerCallback",
                                    base::StringValue("show-keys-changed"),
                                    has_caps_lock,
                                    has_diamond_key);
 }
 
 }  // namespace settings
 }  // namespace chromeos