Add chrome:://device-log

chrome/browser/resources/chromeos/device_log_ui/device_log_ui.css

+/*
+ * Copyright 2014 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.
+ */
+
+html {
+  height: 100%;
+}
+
+body {
+  display: flex;
+  flex-direction: column;
+  height: 100%;
+  margin: 0;
+}
+
+#header {
+  margin: 5px;
+}
+
+/* Checkboxes */
+
+#log-checkbox-container {
+  margin: 5px;
+}
+
+#log-checkbox-container button {
+  -webkit-margin-end: 8px;
+}
+
+#log-checkbox-container label {
+  vertical-align: middle;
+}
+
+#log-checkbox-show {
+  font-weight: bold;
+}
+
+#log-checkbox-container input {
+  margin-bottom: 1px;
+  vertical-align: middle;
+}
+
+/* Log */
+
+#log-container {
+  border: 1px solid rgb(220, 220, 220);
+  flex: 1 1 100%;
+  font-size: 12px;
+  margin: 5px;
+  overflow: auto;
+  padding: 10px;
+}
+
+#log-container p {
+  font-family: monospace;
+  line-height: 20px;
+  margin: 2px;
+}
+
+/* Log Level tags  */
+
+.level-tag {
+  -webkit-margin-end: 5px;
+  border: 1px solid;
+  border-radius: 2px;
+  float: left;
+  height: 14px;
+  margin-top: 2px;
+  padding: 0 4px 2px 4px;
+  width: 50px;
+}
+
+.log-level-error {
+  color: red;
+}
+
+.log-level-user {
+  color: blue;
+}
+
+.log-level-event {
+  color: black;
+}
+
+.log-level-debug {
+  color: grey;
+}
+
+/* Log Type tags */
+
+.type-tag {
+  -webkit-margin-end: 5px;
+  border: 1px solid;
+  border-radius: 2px;
+  float: left;
+  font-weight: bold;
+  height: 14px;
+  margin-top: 2px;
+  padding: 0 4px 2px 4px;
+  width: 50px;
+}
+
+.log-type-login {
+  color: darkgreen;
+}
+
+.log-type-network {
+  color: darkblue;
+}
+
+.log-type-power {
+  color: purple;
+}