DevTools: introduce external service client (behind experiment).

third_party/WebKit/Source/devtools/front_end/terminal/terminal.css

+/*
+ * Copyright 2016 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.
+ */
+
+.terminal {
+    background-color: #111;
+    color: #fafafa;
+    padding: 2px;
+    -webkit-user-select: text;
+    white-space: nowrap;
+}
+
+.terminal:focus .terminal-cursor {
+    background-color: #fafafa;
+}
+
+.disabled .terminal {
+    opacity: 0.5
+}
+
+a {
+    color: inherit;
+    text-decoration: inherit;
+}
+
+a:hover {
+    text-decoration: underline;
+}