Removes the 'launcher' grey bar from display pref.

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.define('options', function() {
   var OptionsPage = options.OptionsPage;
 
   // The scale ratio of the display rectangle to its original size.
   /** @const */ var VISUAL_SCALE = 1 / 10;
 
@@ skipping 572 matching lines @@
      */
     resizeDisplayRectangle_: function(display, index) {
       var borderWidth = (index == this.focusedIndex_) ?
           FOCUSED_BORDER_WIDTH_PX : NORMAL_BORDER_WIDTH_PX;
       display.div.style.width =
           display.width * this.visualScale_ - borderWidth * 2 + 'px';
       var newHeight = display.height * this.visualScale_ - borderWidth * 2;
       display.div.style.height = newHeight + 'px';
       display.nameContainer.style.marginTop =
             (newHeight - display.nameContainer.offsetHeight) / 2 + 'px';
-      if (display.isPrimary) {
-        var launcher = display.div.firstChild;
-        if (launcher && launcher.id == 'display-launcher') {
-          launcher.style.width = display.div.style.width;
-        }
-      }
     },
 
     /**
      * Lays out the display rectangles for mirroring.
      * @private
      */
     layoutMirroringDisplays_: function() {
       // Offset pixels for secondary display rectangles. The offset includes the
       // border width.
       /** @const */ var MIRRORING_OFFSET_PIXELS = 3;
@@ skipping 81 matching lines @@
       for (var i = 0; i < this.displays_.length; i++) {
         var display = this.displays_[i];
         var div = document.createElement('div');
         display.div = div;
 
         div.className = 'displays-display';
         if (i == this.focusedIndex_)
           div.classList.add('displays-focused');
 
         if (display.isPrimary) {
-          // Put a grey rectangle to the primary display to denote launcher
-          // below.
-          var launcher = document.createElement('div');
-          launcher.id = 'display-launcher';
-          div.appendChild(launcher);
           this.primaryDisplay_ = display;
         } else {
           this.secondaryDisplay_ = display;
         }
         var displayNameContainer = document.createElement('div');
         displayNameContainer.textContent = display.name;
         div.appendChild(displayNameContainer);
         display.nameContainer = displayNameContainer;
         this.resizeDisplayRectangle_(display, i);
         div.style.left = display.x * this.visualScale_ + offset.x + 'px';
@@ skipping 69 matching lines @@
       mirroring, displays, layout, offset) {
     DisplayOptions.getInstance().onDisplayChanged_(
         mirroring, displays, layout, offset);
   };
 
   // Export
   return {
     DisplayOptions: DisplayOptions
   };
 });