[Code cleanup]Remove webui virtual keyboard code

ui/keyboard/resources/webui/api_adapter.js

-// 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.
-
-function insertText(text) {
-  chrome.send('insertText', [ text ]);
-}
-
-function sendKeyEvent(event) {
-  chrome.send('sendKeyEvent', [ event ]);
-}
-
-function hideKeyboard() {
-  chrome.send('hideKeyboard');
-}
-
-function keyboardLoaded() {
-  chrome.send('keyboardLoaded');
-}
-
-(function(exports) {
-  /**
-   * An array to save callbacks of each request.
-   * @type {Array.<function(Object)>}
-   */
-  var requestIdCallbackMap = [];
-
-  /**
-   * An incremental integer that represents a unique requestId.
-   * @type {number}
-   */
-  var requestId = 0;
-
-  /**
-   * Called when a text input box gets focus.
-   * @param {object} inputContext Describes an input context. It only contains
-   *     the type of text input box at present and only "password", "number" and
-   *     "text" are supported.
-   */
-  function OnTextInputBoxFocused(inputContext) {
-    // Do not want to use the system keyboard for passwords in webui.
-    if (inputContext.type == 'password')
-      inputContext.type = 'text';
-    keyboard.inputTypeValue = inputContext.type;
-  }
-
-  /**
-   * Gets the context of the focused input field. The context is returned as a
-   * paramter in the |callback|.
-   * @param {function(Object)} callback The callback function after the webui
-   *     function finished.
-   * @return {number} The ID of the new request.
-   */
-  function GetInputContext(callback) {
-    var id = requestId;
-    requestIdCallbackMap[id] = callback;
-    chrome.send('getInputContext', [ id ]);
-    requestId++;
-    return id;
-  }
-
-  /**
-   * Cancel the callback specified by requestId.
-   * @param {number} requestId The requestId of the callback that about to
-   *     cancel.
-   */
-  function CancelRequest(requestId) {
-    requestIdCallbackMap[requestId] = undefined;
-  }
-
-  /**
-   * Webui function callback. Any call to chrome.send('getInputContext', [id])
-   * should trigger this function being called with the parameter
-   * inputContext.requestId == id.
-   * @param {Object} inputContext The context of focused input field. Note we
-   *     only have type(input box type) and requestId fields now.
-   */
-  function GetInputContextCallback(inputContext) {
-    var requestId = inputContext.requestId;
-    if (!requestIdCallbackMap[requestId])
-      return;
-    requestIdCallbackMap[requestId](inputContext);
-  }
-
-  exports.OnTextInputBoxFocused = OnTextInputBoxFocused;
-  exports.getInputContext = GetInputContext;
-  exports.cancelRequest = CancelRequest;
-  exports.GetInputContextCallback = GetInputContextCallback;
-})(this);