DevTools: fix incorrect device orientation bug

third_party/WebKit/Source/devtools/front_end/emulation/sensors.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.
  */
 
 .sensors-view {
     padding: 12px;
     display: block;
 }
@@ skipping 92 matching lines @@
 
 .orientation-fields {
     margin-right: 10px;
 }
 
 .accelerometer-stage {
     -webkit-perspective: 700px;
     -webkit-perspective-origin: 50% 50%;
     width: 160px;
     height: 150px;
-    background: -webkit-linear-gradient(#E1F5FE 0%, #E1F5FE 64%, #b0Ebf3 64%, #DEF6F9 100%);
+    background: linear-gradient(#E1F5FE 0%, #E1F5FE 64%, #b0Ebf3 64%, #DEF6F9 100%);
     transition: 0.2s ease opacity, 0.2s ease -webkit-filter;
 }
 
 .accelerometer-stage.disabled {
     -webkit-filter: grayscale();
     opacity: 0.5;
 }
 
 fieldset.device-orientation-override-section[disabled] .accelerometer-stage {
     cursor: default !important;
@@ skipping 189 matching lines @@
 
 .touch-label select {
     margin-left: 10px;
 }
 
 .panel-section-separator {
     height: 2px;
     margin-bottom: 12px;
     background: #f1f1f1;
 }