[DevTools] Move network throttling to network panel.

Source/devtools/front_end/emulation/responsiveDesignView.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.
  */
 
 .responsive-design {
     position: relative;
     background-color: rgb(0, 0, 0);
     overflow: hidden;
@@ skipping 335 matching lines @@
 }
 
 /* Device section */
 
 .responsive-design-section-device .responsive-design-section-decorator {
     background: linear-gradient(to bottom, rgb(255, 186, 68), rgb(255, 119, 0));
     margin-left: 0;
 }
 
 .responsive-design-section-device select {
-    width: 185px;
+    width: 283px;
 }
 
 .responsive-design-section-device input[type='text'],
 .responsive-design-section-device input[type='text']::-webkit-input-placeholder,
 .responsive-design-section-device select {
     color: rgb(255, 156, 0);
 }
 
 .responsive-design-section-device input[type='checkbox']:checked:after {
     background: rgb(255, 156, 0);
 }
 
-/* Network section */
-
-.responsive-design-section-network select {
-    width: 185px;
-}
-
-.responsive-design-section-network input[type='text'] {
-    width: 222px;
-    margin-left: 5px;
+.responsive-design-user-agent {
+    overflow: hidden;
     text-overflow: ellipsis;
-}
-
-.responsive-design-section-network input[type='text'],
-.responsive-design-section-network input[type='text']::-webkit-input-placeholder,
-.responsive-design-section-network select {
-    color: rgb(65, 175, 255);
-}
-
-.responsive-design-section-network .responsive-design-section-decorator {
-    background: linear-gradient(to bottom, rgb(77, 170, 243), rgb(0, 130, 255));
+    width: 85px;
+    color: rgb(255, 156, 0);
 }
 
 /* Warning message */
 
 .responsive-design-warning {
     position: absolute;
     left: 0;
     right: 0;
     top: 0;
     overflow: hidden;
@@ skipping 87 matching lines @@
     pointer-events: none;
 }
 
 .media-inspector-label-right {
     right: 4px;
 }
 
 .media-inspector-label-left {
     left: 4px;
 }