Adds the touch calibration setting behind a chrome switch

extensions/browser/api/system_display/display_info_provider.cc

 // Copyright 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 "extensions/browser/api/system_display/display_info_provider.h"
 
 #include "base/strings/string_number_conversions.h"
 #include "extensions/common/api/system_display.h"
 #include "ui/display/display.h"
 #include "ui/display/screen.h"
@@ skipping 52 matching lines @@
   unit.is_enabled = true;
   unit.rotation = RotationToDegrees(display.rotation());
   unit.bounds.left = bounds.x();
   unit.bounds.top = bounds.y();
   unit.bounds.width = bounds.width();
   unit.bounds.height = bounds.height();
   unit.work_area.left = work_area.x();
   unit.work_area.top = work_area.y();
   unit.work_area.width = work_area.width();
   unit.work_area.height = work_area.height();
+  unit.has_touch_support =
+      display.touch_support() == display::Display::TOUCH_SUPPORT_AVAILABLE;
   return unit;
 }
 
 bool DisplayInfoProvider::SetDisplayLayout(const DisplayLayoutList& layout) {
   NOTREACHED();  // Implemented on Chrome OS only in override.
   return false;
 }
 
 void DisplayInfoProvider::EnableUnifiedDesktop(bool enable) {}
 
@@ skipping 57 matching lines @@
 
 bool DisplayInfoProvider::IsTouchCalibrationActive(std::string* error) {
   NOTREACHED();  // Implemented on Chrome OS only in override.
   return true;
 }
 
 DisplayInfoProvider::DisplayInfoProvider() {
 }
 
 }  // namespace extensions