[Local NTP] Cleanup: Remove support for "icons" layout

chrome/browser/resources/local_ntp/local_ntp.css

 /* Copyright 2015 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. */
 
 /* TODO: Need to discuss with NTP folks before we remove font-family from the
  * body tag. */
 body {
   background-attachment: fixed !important;
   cursor: default;
   font-family: arial, sans-serif;
@@ skipping 148 matching lines @@
   -webkit-animation: blink 1.3s step-end infinite;
   visibility: inherit;
 }
 
 #most-visited {
   -webkit-user-select: none;
   margin-top: 64px;
   text-align: -webkit-center;
 }
 
-.icon-ntp #most-visited {
-  margin-top: calc(100px - 36px);
-}
-
 /* Non-Google pages have no Fakebox, so don't need top margin. */
 .non-google-page #most-visited {
   margin-top: 0;
 }
 
 #mv-tiles {
+  /* We need a 16px margin and the tiles have 130px height. */
+  height: calc(2*130px + 16px);
+  line-height: calc(130px + 16px);
   margin: 0;
   position: relative;
   text-align: -webkit-auto;
 }
 
-.thumb-ntp #mv-tiles {
-  /* we need a 16px margin and the tiles have 130px height. */
-  height: calc(2*130px + 16px);
-  line-height: calc(130px + 16px);
-}
-
-.icon-ntp #mv-tiles {
-  background: rgba(255,255,255,0.2);
-  border-radius: 4px;
-  height: calc(2 * 112px);
-  padding: calc(36px - 18px) calc(36px - 18px - 12px);
-}
-
-.icon-ntp.dark #mv-tiles {
-  background: rgba(0,0,0,0.4);
-}
-
-.default-theme.icon-ntp #mv-tiles {
-  background: none;
-}
-
 #mv-notice-x {
   -webkit-mask-image: -webkit-image-set(
       url(chrome-search://local-ntp/images/close_3_mask.png) 1x,
       url(chrome-search://local-ntp/images/close_3_mask.png@2x) 2x);
   -webkit-mask-position: 3px 3px;
   -webkit-mask-repeat: no-repeat;
   -webkit-mask-size: 10px 10px;
   background-color: rgba(90,90,90,0.7);
   cursor: pointer;
   display: inline-block;
@@ skipping 18 matching lines @@
 }
 
 /* The notification shown when a tile is blacklisted. */
 #mv-notice {
   font-size: 12px;
   font-weight: bold;
   opacity: 1;
   padding: 10px 0;
 }
 
-.icon-ntp #mv-notice {
-  margin-top: 30px;
-}
-
 #mv-notice span {
   cursor: default;
   display: inline-block;
   height: 16px;
   line-height: 16px;
   vertical-align: top;
 }
 
 /* Links in the notification. */
 #mv-notice-links span {
@@ skipping 67 matching lines @@
 html[dir=rtl] #recent-tabs {
   left: 8px;
   right: auto;
 }
 
 #mv-single {
   border: none;
   height: 100%;
   width: 100%;
 }