Introduce DisplayConfigurationController

chrome/browser/resources/options/chromeos/display_options.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.
 
 cr.exportPath('options');
 
 /**
  * @typedef {{
  *   availableColorProfiles: Array<{profileId: number, name: string}>,
  *   colorProfile: number,
@@ skipping 357 matching lines @@
       // Offset is calculated from top or left edge.
       var primary = this.primaryDisplay_;
       var secondary = this.secondaryDisplay_;
       var offset;
       if (this.layout_ == options.SecondaryDisplayLayout.LEFT ||
           this.layout_ == options.SecondaryDisplayLayout.RIGHT) {
         offset = secondary.div.offsetTop - primary.div.offsetTop;
       } else {
         offset = secondary.div.offsetLeft - primary.div.offsetLeft;
       }
-      chrome.send('setDisplayLayout',
-                  [this.layout_, offset / this.visualScale_]);
+      offset = Math.floor(offset / this.visualScale_);
+      chrome.send('setDisplayLayout', [secondary.id, this.layout_, offset]);
     },
 
     /**
      * Snaps the region [point, width] to [basePoint, baseWidth] if
      * the [point, width] is close enough to the base's edge.
      * @param {number} point The starting point of the region.
      * @param {number} width The width of the region.
      * @param {number} basePoint The starting point of the base region.
      * @param {number} baseWidth The width of the base region.
      * @return {number} The moved point.  Returns point itself if it doesn't
@@ skipping 655 matching lines @@
       mode, displays, layout, offset) {
     DisplayOptions.getInstance().onDisplayChanged_(
         mode, displays, layout, offset);
   };
 
   // Export
   return {
     DisplayOptions: DisplayOptions
   };
 });