[DevTools] Turn NetworkConditionsSettingsTab into web component, move to network module.

third_party/WebKit/Source/devtools/front_end/network/networkConditionsSettingsTab.css

 /*
  * Copyright 2015 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.
  */
 
-.network-conditions-settings-tab .settings-tab.help-content {
-    display: flex;
-    flex-direction: column;
-    align-items: stretch;
-    height: 100%;
-    margin: 0;
-    max-width: 500px;
+:host {
+    overflow:hidden;
 }
 
-.network-conditions-settings-tab .conditions-title {
-    font-size: 120%;
-    color: #222;
+.header {
+    padding: 0 0 6px;
+    border-bottom: 1px solid #EEEEEE;
+    font-size: 18px;
+    font-weight: normal;
     flex: none;
 }
 
-.network-conditions-settings-tab .button-row {
+.add-conditions-button {
     flex: none;
-    display: flex;
-    margin-bottom: 10px;
+    margin: 10px 0;
+    min-width: 140px;
+    align-self: flex-start;
 }
 
-.network-conditions-settings-tab .button-row button {
-    margin-right: 10px;
-    min-width: 120px;
-    flex: none;
+.conditions-list {
+    max-width: 500px;
+    min-width: 340px;
+    flex: auto;
 }
 
 .conditions-list-item {
     padding: 3px 5px 3px 5px;
     height: 30px;
     display: flex;
     align-items: center;
     position: relative;
     flex: auto 1 1;
 }
@@ skipping 45 matching lines @@
     width: 100%;
     text-align: inherit;
 }
 
 .conditions-edit-optional {
     position: absolute;
     bottom: -20px;
     right: 0;
     color: rgb(128, 128, 128);
 }