Removes the 'launcher' grey bar from display pref.

The grey bar is added to the primary display to denote the launcher.
This doesn't make sense because now we provide a launcher for each
display, and we decided to just remove the launcher rather than
keeping it to every displays.

BUG=175569


Review URL: https://chromiumcodereview.appspot.com/12208121

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@181982 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/resources/options/chromeos/display_options.css

@@ -69,13 +69,6 @@ html[dir=rtl] #selected-display-data-container {
   font-weight: bold;
 }
 
-#display-launcher {
-  background-color: lightgrey;
-  bottom: 0;
-  height: 10px;
-  position: absolute;
-}
-
 .displays-display {
   -webkit-user-select: none;
   background: rgb(240, 240, 240);

chrome/browser/resources/options/chromeos/display_options.js

@@ -590,12 +590,6 @@ cr.define('options', function() {
       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;
-        }
-      }
     },
 
     /**
@@ -697,11 +691,6 @@ cr.define('options', function() {
           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;