Add display scaling and rotation shortcuts to keyboard overlay.

chrome/browser/resources/chromeos/keyboard_overlay.js

 // 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 src="keyboard_overlay_data.js"/>
 <include src="keyboard_overlay_accessibility_helper.js"/>
 
 var BASE_KEYBOARD = {
   top: 0,
   left: 0,
@@ skipping 110 matching lines @@
 /**
  * Returns shortcut data.
  * @return {Object} Keyboard shortcut data.
  */
 function getShortcutData() {
   if (shortcutDataCache)
     return shortcutDataCache;
 
   shortcutDataCache = keyboardOverlayData['shortcut'];
 
+  if (!isDisplayRotationEnabled()) {
+    // Rotate screen
+    delete shortcutDataCache['reload<>CTRL<>SHIFT'];
+  }
+  if (!isDisplayUIScalingEnabled()) {
+    // Zoom screen in
+    delete shortcutDataCache['+<>CTRL<>SHIFT'];
+    // Zoom screen out
+    delete shortcutDataCache['-<>CTRL<>SHIFT'];
+    // Reset screen zoom
+    delete shortcutDataCache['0<>CTRL<>SHIFT'];
+  }
+
   // TODO(mazda): Clean this up and move these out to the data js.
   var searchModifierAddShortcuts = {
     '1<>SEARCH': 'keyboardOverlayF1',
     '2<>SEARCH': 'keyboardOverlayF2',
     '3<>SEARCH': 'keyboardOverlayF3',
     '4<>SEARCH': 'keyboardOverlayF4',
     '5<>SEARCH': 'keyboardOverlayF5',
     '6<>SEARCH': 'keyboardOverlayF6',
     '7<>SEARCH': 'keyboardOverlayF7',
     '8<>SEARCH': 'keyboardOverlayF8',
@@ skipping 455 matching lines @@
   learnMoreLinkText.appendChild(learnMoreLinkAnchor);
   instructions.appendChild(learnMoreLinkText);
   keyboard.appendChild(instructions);
 }
 
 /**
  * Returns true if the device has a diamond key.
  * @return {boolean} Returns true if the device has a diamond key.
  */
 function hasDiamondKey() {
-  return (loadTimeData.getString('keyboardOverlayHasChromeOSDiamondKey') ==
-          'true');
+  return loadTimeData.getBoolean('keyboardOverlayHasChromeOSDiamondKey');
 }
 
 /**
+ * Returns true if display rotation feature is enabled.
+ * @return {boolean} True if display rotation feature is enabled.
+ */
+function isDisplayRotationEnabled() {
+  return loadTimeData.getBoolean('keyboardOverlayIsDisplayRotationEnabled');
+}
+
+/**
+ * Returns true if display scaling feature is enabled.
+ * @return {boolean} True if display scaling feature is enabled.
+ */
+function isDisplayUIScalingEnabled() {
+  return loadTimeData.getBoolean('keyboardOverlayIsDisplayUIScalingEnabled');
+}
+
+/**
  * Initializes the layout and the key labels for the keyboard that has a diamond
  * key.
  */
 function initDiamondKey() {
   var newLayoutData = {
     '1D': [65.0, 287.0, 60.0, 60.0],  // left Ctrl
     '38': [185.0, 287.0, 60.0, 60.0],  // left Alt
     'E0 5B': [125.0, 287.0, 60.0, 60.0],  // search
     '3A': [5.0, 167.0, 105.0, 60.0],  // caps lock
     '5B': [803.0, 6.0, 72.0, 35.0],  // lock key
@@ skipping 94 matching lines @@
  * Handles click events of the learn more link.
  * @param {Event} e Mouse click event.
  */
 function learnMoreClicked(e) {
   chrome.send('openLearnMorePage');
   chrome.send('DialogClose');
   e.preventDefault();
 }
 
 document.addEventListener('DOMContentLoaded', init);