First version of the time slicing on the urls. Not ready for review yet.

chrome/browser/resources/ntp4/suggestions_page.css

+/* 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. */
+
+.suggestions {
+  position: absolute;
+  z-index: 0;
+}
+
+.suggestions {
+  -webkit-box-orient: vertical;
+  display: -webkit-box;
+  position: absolute;
+  text-decoration: none;
+}
+
+.suggestions:focus {
+  outline: none;
+}
+
+.suggestions .close-button {
+  -webkit-transition: opacity 150ms;
+  opacity: 0;
+  position: absolute;
+  right: 0;
+  top: 0;
+  z-index: 5;
+}
+
+html[dir=rtl] .suggestions .close-button {
+  left: 0;
+  right: auto;
+}
+
+.suggestions:hover .close-button {
+  -webkit-transition-delay: 500ms;
+  opacity: 1;
+}
+
+.suggestions .close-button:hover {
+  -webkit-transition: none;
+}
+
+.suggestions .favicon {
+  -webkit-margin-start: 5px;
+  background: no-repeat left 50%;
+  bottom: 7px;
+  box-sizing: border-box;
+  display: block;
+  height: 16px;
+  position: absolute;
+  width: 16px;
+}
+
+html[dir='rtl'] .suggestions .favicon {
+  background-position-x: right;
+}
+
+.suggestions .color-stripe {
+  border-bottom-left-radius: 3px 3px;
+  border-bottom-right-radius: 3px 3px;
+  /* Matches height of title.  */
+  bottom: 23px;
+  height: 3px;
+  /* Matches padding-top of the title. */
+  margin-bottom: 8px;
+  position: absolute;
+  width: 100%;
+  z-index: 10;
+}
+
+.suggestions .title {
+  display: block;
+  height: 23px;
+  overflow: hidden;
+  padding-top: 8px;
+  text-align: center;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.suggestions:focus .thumbnail,
+.suggestions:hover .thumbnail {
+  opacity: 0.95;
+}
+
+.suggestions:focus .thumbnail-shield,
+.suggestions:hover .thumbnail-shield,
+.suggestions:active .thumbnail-shield {
+  background: -webkit-linear-gradient(rgba(255, 255, 255, 0),
+                                      rgba(255, 255, 255, 0) 80%,
+                                      rgba(255, 255, 255, 0.9));
+}
+
+/* The thumbnail gets lighter when clicked, but not when the click is on the
+ * close button. */
+.suggestions:active .close-button:not(:active) + .thumbnail {
+  opacity: 0.9;
+}
+
+/* The thumbnail gets a shadow when clicked, but not when the click is on the
+ * close button. */
+.suggestions:active .close-button:not(:active) + .thumbnail .thumbnail-shield {
+  -webkit-box-shadow: inset 0 1px 10px rgba(0, 0, 0, 0.2);
+}