Adds the touch calibration setting behind a chrome switch

chrome/browser/resources/settings/device_page/display.js

Index: chrome/browser/resources/settings/device_page/display.js
diff --git a/chrome/browser/resources/settings/device_page/display.js b/chrome/browser/resources/settings/device_page/display.js
index 549dfa19fea3fbbbb4ba79f780df89d549eaec53..3f5cfffc1fccad9a660ffe564bdcee9782f71076 100644
--- a/chrome/browser/resources/settings/device_page/display.js
+++ b/chrome/browser/resources/settings/device_page/display.js
@@ -166,6 +166,20 @@ Polymer({
   },
 
   /**
+   * Returns true if the given display has touch support and is not an internal
+   * display. If the feature is not enabled via the switch, this will return
+   * false.
+   * @param {!chrome.system.display.DisplayUnitInfo} display Display being
+   *     checked for touch support.
+   * @return {boolean}
+   * @private
+   */
+  showTouchCalibrationSetting_: function(display) {
+    return !display.isInternal && display.hasTouchSupport &&
+        loadTimeData.getBoolean('enableTouchCalibrationSetting');
+  },
+
+  /**
    * @param {!Array<!chrome.system.display.DisplayUnitInfo>} displays
    * @return {boolean}
    * @private
@@ -296,6 +310,16 @@ Polymer({
   },
 
   /**
+   * Handles event when a touch calibration option is selected.
+   * @param {!Event} e
+   * @private
+   */
+  onTouchCalibrationTap_: function(e) {
+    settings.display.systemDisplayApi.touchCalibrationStart(
+        this.selectedDisplay.id);
+  },
+
+  /**
    * Handles the event when an option from display select menu is selected.
    * @param {!{target: !HTMLSelectElement}} e
    * @private