Add a virtual keyboard webui at chrome://keyboard/

ui/keyboard/keyboard_ui_controller.cc

Index: ui/keyboard/keyboard_ui_controller.cc
diff --git a/ui/keyboard/keyboard_ui_controller.cc b/ui/keyboard/keyboard_ui_controller.cc
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+++ b/ui/keyboard/keyboard_ui_controller.cc
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+// Copyright (c) 2013 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 "ui/keyboard/keyboard_ui_controller.h"
+
+#include "content/public/browser/browser_context.h"
+#include "content/public/browser/web_contents.h"
+#include "content/public/browser/web_ui.h"
+#include "content/public/browser/web_ui_data_source.h"
+#include "grit/keyboard_resources.h"
+#include "ui/keyboard/keyboard_constants.h"
+
+namespace {
+
+content::WebUIDataSource* CreateKeyboardUIDataSource() {
+  content::WebUIDataSource* source =
+      content::WebUIDataSource::Create(keyboard::kKeyboardWebUIHost);
+
+  source->SetDefaultResource(IDR_KEYBOARD_INDEX);
+
+  source->AddResourcePath("main.css", IDR_KEYBOARD_MAIN_CSS);
+
+  source->AddResourcePath("main.js", IDR_KEYBOARD_MAIN_JS);
+  source->AddResourcePath("common.js", IDR_KEYBOARD_COMMON_JS);
+  source->AddResourcePath("layout_us.js", IDR_KEYBOARD_LAYOUT_US_JS);
+  source->AddResourcePath("images/chevron.svg", IDR_KEYBOARD_IMAGES_CHEVRON);
+  source->AddResourcePath("images/del.svg", IDR_KEYBOARD_IMAGES_DEL);
+  source->AddResourcePath("images/keyboard.svg", IDR_KEYBOARD_IMAGES_KEYBOARD);
+  source->AddResourcePath("images/mic.svg", IDR_KEYBOARD_IMAGES_MIC);
+  source->AddResourcePath("images/ret.svg", IDR_KEYBOARD_IMAGES_RET);
+  source->AddResourcePath("images/shift_down.svg",
+      IDR_KEYBOARD_IMAGES_SHIFT_DOWN);
+  source->AddResourcePath("images/shift.svg", IDR_KEYBOARD_IMAGES_SHIFT);
+  source->AddResourcePath("images/tab.svg", IDR_KEYBOARD_IMAGES_TAB);
+
+  return source;
+}
+
+}  // namespace
+
+namespace keyboard {
+
+KeyboardUIController::KeyboardUIController(content::WebUI* web_ui)
+    : WebUIController(web_ui) {
+  content::BrowserContext* browser_context =
+      web_ui->GetWebContents()->GetBrowserContext();
+  content::WebUIDataSource::Add(
+      browser_context,
+      CreateKeyboardUIDataSource());
+}
+
+KeyboardUIController::~KeyboardUIController() {}
+
+}  // namespace keyboard