Added new adaptive "Suggest" tab on the New Tab Page, behing the flag, for the experiments.

chrome/browser/resources/ntp4/suggested_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. */
+
+.suggested {
+  position: absolute;
+  z-index: 0;
+}
+
+.suggested {
+  -webkit-box-orient: vertical;
+  display: -webkit-box;
+  position: absolute;
+  text-decoration: none;
+}
+
+.suggested:focus {
+  outline: none;
+}
+
+.fills-parent {
+  bottom: 0;
+  display: -webkit-box;
+  left: 0;
+  position: absolute;
+  right: 0;
+  top: 0;
+}
+
+/* filler mode: hide everything except the thumbnail --- leave a grey rectangle
+ * in its place. */
+.filler * {
+  visibility: hidden;
+}
+
+.filler {

[Evan Stade, 2012/02/11 01:56:05]

you can't just copy and then fiddle with the css. Rules like this one will apply
across the whole page; filler class is being used by most visited so if you
change something here it will apply to the most visited page as well.

[GeorgeY, 2012/02/17 01:09:40]

Done.

+  pointer-events: none;
+}
+
+.suggested .close-button {
+  opacity: 0;
+  position: absolute;
+  right: 0;
+  top: 0;
+  z-index: 5;
+  -webkit-transition: opacity 150ms;
+}
+
+html[dir=rtl] .suggested .close-button {
+  left: 0;
+  right: auto;
+}
+
+.suggested:hover .close-button {
+  opacity: 1;
+  -webkit-transition-delay: 500ms;
+}
+
+.suggested .close-button:hover {
+  -webkit-transition: none;
+}
+
+.suggested .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'] .suggested .favicon {
+  background-position-x: right;
+}
+
+.suggested .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;
+}
+
+.suggested .title {
+  display: block;
+  height: 23px;
+  overflow: hidden;
+  padding-top: 8px;
+  text-align: center;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.thumbnail {
+  background: no-repeat;
+  /* This shows for missing thumbnails. */
+  background-color: #eee;
+  background-size: 100%;
+  border-radius: 3px;
+  /* These max dimensions are not necessary, as the sizing logic in the .js
+   * should be sufficient, but they're here for extra insurance. We never want
+   * to scale a thumbnail larger than this size. */
+  max-height: 132px;
+  max-width: 212px;
+  -webkit-transition: opacity 150ms;
+}
+
+.filler .thumbnail {
+  /* TODO(estade): there seems to be a webkit bug where this border is not
+   * always removed when it should be. Investigate. */
+  border: 1px solid;
+  visibility: visible;
+}
+
+.thumbnail-shield {
+  border-radius: 3px;
+  background: -webkit-linear-gradient(rgba(255, 255, 255, 0),
+                                      rgba(255, 255, 255, 0) 50%,
+                                      rgba(255, 255, 255, 0.9));
+}
+
+/* TODO(dbeam): Remove this when printing of -webkit-linear-gradient() works. */
+@media print {
+  .thumbnail-shield {
+    background: none;
+  }
+}
+
+.suggested:focus .thumbnail,
+.suggested:hover .thumbnail {
+  opacity: 0.95;
+}
+
+.suggested:focus .thumbnail-shield,
+.suggested:hover .thumbnail-shield,
+.suggested: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. */
+.suggested: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. */
+.suggested:active .close-button:not(:active) + .thumbnail .thumbnail-shield {
+  -webkit-box-shadow: inset 0 1px 10px rgba(0, 0, 0, 0.2);
+}
+
+.thumbnail-wrapper {
+  border: 1px solid transparent;
+  border-radius: 3px;
+  display: block;
+  position: relative;
+  z-index: 5;
+  -webkit-box-flex: 1;
+  -webkit-transition: background-color 150ms;
+}
+
+.filler .thumbnail-wrapper {
+  visibility: visible;
+}
+
+/* 'finishing-drag' is the state we are in after dropping on the trash can.
+ * Override opacity of the tile to 1, so that the new tile animation
+ * occurs simultaneously with the trash animation. */
+.tile.dragging.finishing-drag {
+  opacity: 1;
+}
+
+/* Don't display the new tile until there's something to show.  */
+.blacklisted {
+  opacity: 0;
+}