DevTools: migrate MetricsSidebarPane to shadow

third_party/WebKit/Source/devtools/front_end/elements/metricsSidebarPane.css

+/**
+ * Copyright 2017 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.
+ */
+
+.metrics {
+    padding: 8px;
+    font-size: 10px;
+    text-align: center;
+    white-space: nowrap;
+    min-height: 190px;
+    display: flex;
+    flex-direction: column;
+    -webkit-align-items: center;
+    -webkit-justify-content: center;
+}
+
+:host-context(.-theme-with-dark-background) .metrics {
+    color: #222;
+}
+
+:host-context(.-theme-with-dark-background) .metrics > div:hover {
+    color: #ccc;
+}
+
+.metrics .label {
+    position: absolute;
+    font-size: 10px;
+    margin-left: 3px;
+    padding-left: 2px;
+    padding-right: 2px;
+}
+
+.metrics .position {
+    border: 1px rgb(66%, 66%, 66%) dotted;
+    background-color: white;
+    display: inline-block;
+    text-align: center;
+    padding: 3px;
+    margin: 3px;
+}
+
+.metrics .margin {
+    border: 1px dashed;
+    background-color: white;
+    display: inline-block;
+    text-align: center;
+    vertical-align: middle;
+    padding: 3px;
+    margin: 3px;
+}
+
+.metrics .border {
+    border: 1px black solid;
+    background-color: white;
+    display: inline-block;
+    text-align: center;
+    vertical-align: middle;
+    padding: 3px;
+    margin: 3px;
+}
+
+.metrics .padding {
+    border: 1px grey dashed;
+    background-color: white;
+    display: inline-block;
+    text-align: center;
+    vertical-align: middle;
+    padding: 3px;
+    margin: 3px;
+}
+
+.metrics .content {
+    position: static;
+    border: 1px gray solid;
+    background-color: white;
+    display: inline-block;
+    text-align: center;
+    vertical-align: middle;
+    padding: 3px;
+    margin: 3px;
+    min-width: 80px;
+    overflow: visible;
+}
+
+.metrics .content span {
+    display: inline-block;
+}
+
+.metrics .editing {
+    position: relative;
+    z-index: 100;
+    cursor: text;
+}
+
+.metrics .left {
+    display: inline-block;
+    vertical-align: middle;
+}
+
+.metrics .right {
+    display: inline-block;
+    vertical-align: middle;
+}
+
+.metrics .top {
+    display: inline-block;
+}
+
+.metrics .bottom {
+    display: inline-block;
+}