[DevTools] Fix overflow in devices view.

third_party/WebKit/Source/devtools/front_end/devices/devicesView.css

 /*
  * Copyright (c) 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.
  */
 
 .devices-container {
     overflow: hidden;
     flex: auto;
 }
@@ skipping 58 matching lines @@
 .view-title {
     font-size: 16px;
     flex: none;
 }
 
 .devices-footer {
     border-top: 1px solid #cdcdcd;
     background-color: #f3f3f3;
     flex: none;
     padding: 3px 10px;
+    overflow: hidden;
 }
 
 .devices-footer > span {
     white-space: pre;
 }
 
 .discovery-view {
-    overflow: auto;
+    overflow-x: hidden;
+    overflow-y: auto;
     padding: 15px 15px 0px 0px;
 }
 
 .discovery-view > * {
     flex: none;
 }
 
 .usb-checkbox {
     padding-bottom: 8px;
     margin-top: 20px;
@@ skipping 231 matching lines @@
 }
 
 .device-view-port-icon.device-view-port-icon-error {
     background-color: red;
 }
 
 .device-view-port-icon.device-view-port-icon-transient {
     transform: scale(1.2);
     background-color: orange;
 }